diff --git a/app/src/main/java/com/longnh15/heimdall/data/repository/BaseRepository.kt b/app/src/main/java/com/longnh15/heimdall/data/repository/BaseRepository.kt
index 42e0f08..4c8f3e4 100644
--- a/app/src/main/java/com/longnh15/heimdall/data/repository/BaseRepository.kt
+++ b/app/src/main/java/com/longnh15/heimdall/data/repository/BaseRepository.kt
@@ -13,7 +13,7 @@ abstract class BaseRepository {
         return if (response.isSuccessful) {
             response.body()?.let {
                 ApiResult.Success(it)
-            } ?: ApiResult.Error(-999, "Empty response body")
+            } ?: ApiResult.Error(ApiResult.Error.CODE_UNKNOWN, "Empty response body")
         } else {
             response.errorBody().toApiError()
         }
@@ -28,7 +28,7 @@ abstract class BaseRepository {
         return if (response.isSuccessful) {
             response.body()?.let {
                 ApiResult.Success(transform(it))
-            } ?: ApiResult.Error(-999, "Empty response body")
+            } ?: ApiResult.Error(ApiResult.Error.CODE_UNKNOWN, "Empty response body")
         } else {
             response.errorBody().toApiError()
         }
diff --git a/app/src/main/java/com/longnh15/heimdall/data/source/remote/ErrorBodyParser.kt b/app/src/main/java/com/longnh15/heimdall/data/source/remote/ErrorBodyParser.kt
index 4b1d8d6..627d07d 100644
--- a/app/src/main/java/com/longnh15/heimdall/data/source/remote/ErrorBodyParser.kt
+++ b/app/src/main/java/com/longnh15/heimdall/data/source/remote/ErrorBodyParser.kt
@@ -7,12 +7,12 @@ import okhttp3.ResponseBody
 
 fun  ResponseBody?.toApiError(): ApiResult.Error {
     if (this == null) {
-        return ApiResult.Error(-999, "Unknown error")
+        return ApiResult.Error(ApiResult.Error.CODE_UNKNOWN, "Unknown error")
     }
     return try {
         val error = json.decodeFromString<ErrorResponse>(string())
         ApiResult.Error(error.error, error.message)
     } catch (_: Exception) {
-        ApiResult.Error(-999, "Unknown error")
+        ApiResult.Error(ApiResult.Error.CODE_UNKNOWN, "Unknown error")
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/domain/model/ApiResult.kt b/app/src/main/java/com/longnh15/heimdall/domain/model/ApiResult.kt
index f482e91..6efc7db 100644
--- a/app/src/main/java/com/longnh15/heimdall/domain/model/ApiResult.kt
+++ b/app/src/main/java/com/longnh15/heimdall/domain/model/ApiResult.kt
@@ -2,5 +2,10 @@ package com.longnh15.heimdall.domain.model
 
 sealed class ApiResult<out T> {
     data class Success<T>(val data: T): ApiResult<T>()
-    data class Error(val code: Int, val message: String): ApiResult<Nothing>()
+    data class Error(val code: Int, val message: String): ApiResult<Nothing>() {
+        companion object {
+            /** Sentinel code for client-side failures (no/garbled response). [message] is an internal default, not shown to users. */
+            const val CODE_UNKNOWN = -999
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/AuthForm.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/AuthForm.kt
index cea6708..afe412b 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/AuthForm.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/AuthForm.kt
@@ -38,6 +38,7 @@ import androidx.compose.ui.tooling.preview.AndroidUiModes.UI_MODE_NIGHT_YES
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import com.longnh15.heimdall.ui.common.UiText
 import com.longnh15.heimdall.ui.theme.HeimdallTheme
 
 @Composable
@@ -61,7 +62,7 @@ fun AuthFormTextField(
     onValueChange: (String) -> Unit,
     label: String,
     placeholder: String,
-    error: String? = null,
+    error: UiText? = null,
     isHideContent: Boolean = false,
     isLastField: Boolean = false,
     autoCorrectEnabled: Boolean = true,
@@ -121,7 +122,7 @@ fun AuthFormTextField(
         }
         if (error != null) {
             Text(
-                text = error,
+                text = error.asString(),
                 modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
                 color = MaterialTheme.colorScheme.error,
                 fontSize = 12.sp
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginEvent.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginEvent.kt
index 450fb24..92e1a09 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginEvent.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginEvent.kt
@@ -1,6 +1,8 @@
 package com.longnh15.heimdall.ui.auth.login
 
+import com.longnh15.heimdall.ui.common.UiText
+
 sealed class LoginEvent {
     data object LoginSuccess: LoginEvent()
-    data class LoginError(val message: String): LoginEvent()
+    data class LoginError(val message: UiText): LoginEvent()
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginScreen.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginScreen.kt
index 449ce3a..792ec78 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginScreen.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginScreen.kt
@@ -38,12 +38,15 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.focus.focusProperties
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.longnh15.heimdall.R
 import com.longnh15.heimdall.ui.theme.HeimdallTheme
 
 @Composable
@@ -55,12 +58,13 @@ fun LoginScreen(
 ) {
     val snackbarHostState = remember { SnackbarHostState() }
     val state = viewModel.state
+    val context = LocalContext.current
 
     LaunchedEffect(Unit) {
         viewModel.uiEvent.collect { event ->
             when (event) {
                 is LoginEvent.LoginSuccess -> navigateToVault()
-                is LoginEvent.LoginError -> snackbarHostState.showSnackbar(event.message)
+                is LoginEvent.LoginError -> snackbarHostState.showSnackbar(event.message.asString(context))
             }
         }
     }
@@ -87,7 +91,7 @@ fun LoginScreen(
                 Spacer(Modifier.height(24.dp))
 
                 Text(
-                    text = "Welcome back",
+                    text = stringResource(R.string.login_title),
                     style = MaterialTheme.typography.headlineLarge,
                     color = MaterialTheme.colorScheme.onBackground
                 )
@@ -95,7 +99,7 @@ fun LoginScreen(
                 Spacer(Modifier.height(8.dp))
 
                 Text(
-                    text = "Access your secure vault credentials",
+                    text = stringResource(R.string.login_subtitle),
                     style = MaterialTheme.typography.bodyMedium,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                     textAlign = TextAlign.Center
@@ -107,8 +111,8 @@ fun LoginScreen(
                     AuthFormTextField(
                         value = state.email,
                         onValueChange = viewModel::onEmailChanged,
-                        label = "Email",
-                        placeholder = "you@email.com",
+                        label = stringResource(R.string.field_email_label),
+                        placeholder = stringResource(R.string.login_email_placeholder),
                         error = state.emailError,
                         keyboardType = KeyboardType.Email
                     )
@@ -116,8 +120,8 @@ fun LoginScreen(
                     AuthFormTextField(
                         value = state.password,
                         onValueChange = viewModel::onPasswordChanged,
-                        label = "Password",
-                        placeholder = "••••••••",
+                        label = stringResource(R.string.field_password_label),
+                        placeholder = stringResource(R.string.field_password_placeholder),
                         error = state.passwordError,
                         isHideContent = !state.isShowPassword,
                         autoCorrectEnabled = false,
@@ -143,7 +147,7 @@ fun LoginScreen(
                         .align(Alignment.End)
                         .widthIn(max = 480.dp)
                 ) {
-                    Text("Forgot password?")
+                    Text(stringResource(R.string.login_forgot_password))
                 }
 
                 Spacer(Modifier.height(8.dp))
@@ -161,7 +165,7 @@ fun LoginScreen(
                     )
                 ) {
                     Text(
-                        text = "Login",
+                        text = stringResource(R.string.login_button),
                         style = MaterialTheme.typography.titleMedium
                     )
                 }
@@ -173,13 +177,13 @@ fun LoginScreen(
                     horizontalArrangement = Arrangement.Center
                 ) {
                     Text(
-                        text = "Don't have an account?",
+                        text = stringResource(R.string.login_no_account),
                         style = MaterialTheme.typography.bodyMedium,
                         color = MaterialTheme.colorScheme.onSurfaceVariant
                     )
                     TextButton(onClick = navigateToRegister) {
                         Text(
-                            text = "Create one",
+                            text = stringResource(R.string.login_create_one),
                             fontWeight = FontWeight.SemiBold
                         )
                     }
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginState.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginState.kt
index 8278f8a..df57a11 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginState.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginState.kt
@@ -1,11 +1,13 @@
 package com.longnh15.heimdall.ui.auth.login
 
+import com.longnh15.heimdall.ui.common.UiText
+
 data class LoginState(
     val email: String = "",
     val password: String = "",
 
-    val emailError: String? = null,
-    val passwordError: String? = null,
+    val emailError: UiText? = null,
+    val passwordError: UiText? = null,
 
     val isShowPassword: Boolean = false,
 )
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginViewModel.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginViewModel.kt
index b4ad292..fa6bcb6 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginViewModel.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/login/LoginViewModel.kt
@@ -5,9 +5,12 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.longnh15.heimdall.R
 import com.longnh15.heimdall.common.ValidationHelper
 import com.longnh15.heimdall.domain.model.ApiResult
 import com.longnh15.heimdall.domain.repository.AuthRepository
+import com.longnh15.heimdall.ui.common.UiText
+import com.longnh15.heimdall.ui.common.toUiText
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.launch
@@ -38,18 +41,18 @@ class LoginViewModel(
         viewModelScope.launch {
             when (val result = authRepository.login(state.email, state.password)) {
                 is ApiResult.Success -> _uiEvent.send(LoginEvent.LoginSuccess)
-                is ApiResult.Error -> _uiEvent.send(LoginEvent.LoginError(result.message))
+                is ApiResult.Error -> _uiEvent.send(LoginEvent.LoginError(result.toUiText()))
             }
         }
     }
 
     private fun validate(): Boolean {
         val emailError = when {
-            state.email.isBlank() -> "Email is required"
-            !ValidationHelper.isEmail(state.email) -> "Enter a valid email address"
+            state.email.isBlank() -> UiText.Res(R.string.error_email_required)
+            !ValidationHelper.isEmail(state.email) -> UiText.Res(R.string.error_email_invalid)
             else -> null
         }
-        val passwordError = if (state.password.isBlank()) "Password is required" else null
+        val passwordError = if (state.password.isBlank()) UiText.Res(R.string.error_password_required) else null
 
         state = state.copy(emailError = emailError, passwordError = passwordError)
         return emailError == null && passwordError == null
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterEvent.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterEvent.kt
index 6d8dde4..71d4813 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterEvent.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterEvent.kt
@@ -1,6 +1,8 @@
 package com.longnh15.heimdall.ui.auth.register
 
+import com.longnh15.heimdall.ui.common.UiText
+
 sealed class RegisterEvent {
     data object RegisterSuccess: RegisterEvent()
-    data class RegisterError(val message: String): RegisterEvent()
+    data class RegisterError(val message: UiText): RegisterEvent()
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterScreen.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterScreen.kt
index dd694dc..157347a 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterScreen.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterScreen.kt
@@ -27,19 +27,25 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.focus.focusProperties
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.longnh15.heimdall.R
 import com.longnh15.heimdall.ui.auth.login.AuthDivider
 import com.longnh15.heimdall.ui.auth.login.AuthForm
 import com.longnh15.heimdall.ui.auth.login.AuthFormTextField
@@ -51,7 +57,18 @@ fun RegisterScreen(
     viewModel: RegisterViewModel = viewModel(),
     navigateToLogin: () -> Unit = {},
 ) {
+    val snackbarHostState = remember { SnackbarHostState() }
     val state = viewModel.state
+    val context = LocalContext.current
+
+    LaunchedEffect(Unit) {
+        viewModel.uiEvent.collect { event ->
+            when (event) {
+                is RegisterEvent.RegisterSuccess -> navigateToLogin()
+                is RegisterEvent.RegisterError -> snackbarHostState.showSnackbar(event.message.asString(context))
+            }
+        }
+    }
 
     HeimdallTheme {
         Scaffold(
@@ -72,7 +89,7 @@ fun RegisterScreen(
                 Spacer(Modifier.height(24.dp))
 
                 Text(
-                    text = "Create account",
+                    text = stringResource(R.string.register_title),
                     style = MaterialTheme.typography.headlineLarge,
                     color = MaterialTheme.colorScheme.onBackground
                 )
@@ -80,7 +97,7 @@ fun RegisterScreen(
                 Spacer(Modifier.height(8.dp))
 
                 Text(
-                    text = "Secure your digital life with enterprise-grade encryption.",
+                    text = stringResource(R.string.register_subtitle),
                     style = MaterialTheme.typography.bodyMedium,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                     textAlign = TextAlign.Center
@@ -92,24 +109,26 @@ fun RegisterScreen(
                     AuthFormTextField(
                         value = state.name,
                         onValueChange = viewModel::onNameChanged,
-                        label = "Full name",
-                        placeholder = "John Doe",
+                        label = stringResource(R.string.register_name_label),
+                        placeholder = stringResource(R.string.register_name_placeholder),
                         keyboardType = KeyboardType.Text
                     )
                     AuthDivider()
                     AuthFormTextField(
                         value = state.email,
                         onValueChange = viewModel::onEmailChanged,
-                        label = "Email",
-                        placeholder = "name@vault.com",
+                        label = stringResource(R.string.field_email_label),
+                        placeholder = stringResource(R.string.register_email_placeholder),
+                        error = state.emailError,
                         keyboardType = KeyboardType.Email,
                     )
                     AuthDivider()
                     AuthFormTextField(
                         value = state.password,
                         onValueChange = viewModel::onPasswordChanged,
-                        label = "Password",
-                        placeholder = "••••••••",
+                        label = stringResource(R.string.field_password_label),
+                        placeholder = stringResource(R.string.field_password_placeholder),
+                        error = state.passwordError,
                         isHideContent = !state.isShowPassword,
                         autoCorrectEnabled = false,
                         isLastField = true,
@@ -143,7 +162,7 @@ fun RegisterScreen(
                     )
                 ) {
                     Text(
-                        text = "Create account",
+                        text = stringResource(R.string.register_button),
                         style = MaterialTheme.typography.titleMedium
                     )
                 }
@@ -151,7 +170,7 @@ fun RegisterScreen(
                 Spacer(Modifier.height(16.dp))
 
                 Text(
-                    text = "By creating an account you agree to our Terms of Service and Privacy Policy.",
+                    text = stringResource(R.string.register_terms),
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                     textAlign = TextAlign.Center,
@@ -165,13 +184,13 @@ fun RegisterScreen(
                     horizontalArrangement = Arrangement.Center
                 ) {
                     Text(
-                        text = "Already have an account?",
+                        text = stringResource(R.string.register_have_account),
                         style = MaterialTheme.typography.bodyMedium,
                         color = MaterialTheme.colorScheme.onSurfaceVariant
                     )
                     TextButton(onClick = navigateToLogin) {
                         Text(
-                            text = "Sign in",
+                            text = stringResource(R.string.register_sign_in),
                             fontWeight = FontWeight.SemiBold
                         )
                     }
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterState.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterState.kt
index 0840181..069379d 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterState.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterState.kt
@@ -1,12 +1,14 @@
 package com.longnh15.heimdall.ui.auth.register
 
+import com.longnh15.heimdall.ui.common.UiText
+
 data class RegisterState(
     val name: String = "",
     val email: String = "",
     val password: String = "",
 
-    val emailError: String? = null,
-    val passwordError: String? = null,
+    val emailError: UiText? = null,
+    val passwordError: UiText? = null,
 
     val isShowPassword: Boolean = false
 )
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterViewModel.kt b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterViewModel.kt
index 63cef89..ce1f9c1 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterViewModel.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/auth/register/RegisterViewModel.kt
@@ -5,9 +5,12 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.longnh15.heimdall.R
 import com.longnh15.heimdall.common.ValidationHelper
 import com.longnh15.heimdall.domain.model.ApiResult
 import com.longnh15.heimdall.domain.repository.AuthRepository
+import com.longnh15.heimdall.ui.common.UiText
+import com.longnh15.heimdall.ui.common.toUiText
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.launch
@@ -42,20 +45,21 @@ class RegisterViewModel(
         viewModelScope.launch {
             when (val result = authRepository.register(state.email, state.password, state.name)) {
                 is ApiResult.Success -> _uiEvent.send(RegisterEvent.RegisterSuccess)
-                is ApiResult.Error -> _uiEvent.send(RegisterEvent.RegisterError(result.message))
+                is ApiResult.Error -> _uiEvent.send(RegisterEvent.RegisterError(result.toUiText()))
             }
         }
     }
 
     private fun validate(): Boolean {
         val emailError = when {
-            state.email.isBlank() -> "Email is required"
-            !ValidationHelper.isEmail(state.email) -> "Enter a valid email address"
+            state.email.isBlank() -> UiText.Res(R.string.error_email_required)
+            !ValidationHelper.isEmail(state.email) -> UiText.Res(R.string.error_email_invalid)
             else -> null
         }
         val passwordError = when {
-            state.password.isBlank() -> "Password is required"
-            state.password.length < 12 -> "Password must be at least 12 characters"
+            state.password.isBlank() -> UiText.Res(R.string.error_password_required)
+            state.password.length < MIN_PASSWORD_LENGTH ->
+                UiText.Res(R.string.error_password_too_short, MIN_PASSWORD_LENGTH)
             else -> null
         }
 
@@ -63,4 +67,7 @@ class RegisterViewModel(
         return emailError == null && passwordError == null
     }
 
+    private companion object {
+        const val MIN_PASSWORD_LENGTH = 12
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/common/AutofillNotEnabledDialog.kt b/app/src/main/java/com/longnh15/heimdall/ui/common/AutofillNotEnabledDialog.kt
index a69f107..335da56 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/common/AutofillNotEnabledDialog.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/common/AutofillNotEnabledDialog.kt
@@ -7,6 +7,8 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.res.stringResource
+import com.longnh15.heimdall.R
 
 @Composable
 fun AutofillNotEnabledDialog(
@@ -18,15 +20,15 @@ fun AutofillNotEnabledDialog(
         icon = {
             Icon(Icons.Outlined.Warning, contentDescription = null)
         },
-        title = { Text("Autofill not enabled") },
+        title = { Text(stringResource(R.string.autofill_dialog_title)) },
         text = {
-            Text("Heimdall wasn't selected as your autofill provider. Open settings and tap Heimdall to enable it.")
+            Text(stringResource(R.string.autofill_dialog_body))
         },
         confirmButton = {
-            TextButton(onClick = onRetry) { Text("Open settings") }
+            TextButton(onClick = onRetry) { Text(stringResource(R.string.open_settings)) }
         },
         dismissButton = {
-            TextButton(onClick = onDismiss) { Text("Skip for now") }
+            TextButton(onClick = onDismiss) { Text(stringResource(R.string.autofill_dialog_skip)) }
         }
     )
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/common/UiText.kt b/app/src/main/java/com/longnh15/heimdall/ui/common/UiText.kt
new file mode 100644
index 0000000..1857c55
--- /dev/null
+++ b/app/src/main/java/com/longnh15/heimdall/ui/common/UiText.kt
@@ -0,0 +1,39 @@
+package com.longnh15.heimdall.ui.common
+
+import android.content.Context
+import androidx.annotation.StringRes
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.res.stringResource
+import com.longnh15.heimdall.R
+import com.longnh15.heimdall.domain.model.ApiResult
+
+/**
+ * A string that may be defined either as a runtime value (e.g. a message from the
+ * backend) or as a string resource. Lets layers without a [Context] (ViewModels,
+ * domain/data) describe user-facing text without resolving it, deferring resolution
+ * to the UI where a [Context] / composition is available.
+ */
+sealed interface UiText {
+    data class Dynamic(val value: String) : UiText
+
+    class Res(@StringRes val id: Int, vararg val args: Any) : UiText
+
+    @Composable
+    fun asString(): String = when (this) {
+        is Dynamic -> value
+        is Res -> stringResource(id, *args)
+    }
+
+    fun asString(context: Context): String = when (this) {
+        is Dynamic -> value
+        is Res -> context.getString(id, *args)
+    }
+}
+
+/**
+ * Maps an API error to user-facing text: client-side failures ([ApiResult.Error.CODE_UNKNOWN])
+ * become a localized generic message, while real server messages are shown as-is.
+ */
+fun ApiResult.Error.toUiText(): UiText =
+    if (code == ApiResult.Error.CODE_UNKNOWN) UiText.Res(R.string.error_generic)
+    else UiText.Dynamic(message)
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingFinalPage.kt b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingFinalPage.kt
index f743b92..aa80a99 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingFinalPage.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingFinalPage.kt
@@ -18,6 +18,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import com.longnh15.heimdall.R
@@ -33,7 +34,7 @@ fun OnboardingFinalPage(
         verticalArrangement = Arrangement.spacedBy(32.dp)
     ) {
         OnboardingBadge {
-            Text("You're all set")
+            Text(stringResource(R.string.onboarding_final_badge))
         }
         Box(
             modifier = Modifier
@@ -43,20 +44,20 @@ fun OnboardingFinalPage(
         ) {
             Image(
                 painterResource(R.drawable.tick_icon),
-                "Page icon",
+                stringResource(R.string.onboarding_page_icon_desc),
             )
         }
 
-        Text("Heimdall is watching", style = MaterialTheme.typography.headlineMedium)
+        Text(stringResource(R.string.onboarding_final_title), style = MaterialTheme.typography.headlineMedium)
         Text(
-            text = "Your vault is ready. Start adding passwords or import from your browser to get going.",
+            text = stringResource(R.string.onboarding_final_body),
             textAlign = TextAlign.Center
         )
 
         Spacer(Modifier.weight(1f))
 
         Button(onClick = navigateToVault) {
-            Text("Enter my vault ↗")
+            Text(stringResource(R.string.onboarding_final_enter_vault))
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingIntroducePage.kt b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingIntroducePage.kt
index 33170af..fb534f3 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingIntroducePage.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingIntroducePage.kt
@@ -20,6 +20,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
@@ -34,11 +35,11 @@ fun OnboardingIntroducePage(modifier: Modifier = Modifier) {
         verticalArrangement = Arrangement.spacedBy(32.dp)
     ) {
         OnboardingBadge {
-            Text("What you get")
+            Text(stringResource(R.string.onboarding_introduce_badge))
         }
-        Text("Everything in one vault", style = MaterialTheme.typography.headlineMedium)
+        Text(stringResource(R.string.onboarding_introduce_title), style = MaterialTheme.typography.headlineMedium)
         Text(
-            text = "Heimdall keeps your passwords safe and fills them in automatically",
+            text = stringResource(R.string.onboarding_introduce_body),
             textAlign = TextAlign.Center
         )
         Column(
@@ -47,18 +48,18 @@ fun OnboardingIntroducePage(modifier: Modifier = Modifier) {
         ) {
             FeatureItem(
                 iconDrawableRes = R.drawable.lock_icon,
-                text = "End-to-end encrypted",
-                sub = "Only you can see your data"
+                text = stringResource(R.string.onboarding_feature_encrypted_title),
+                sub = stringResource(R.string.onboarding_feature_encrypted_sub)
             )
             FeatureItem(
                 iconDrawableRes = R.drawable.crosshair_icon,
-                text = "Autofill anywhere",
-                sub = "Works across all your apps"
+                text = stringResource(R.string.onboarding_feature_autofill_title),
+                sub = stringResource(R.string.onboarding_feature_autofill_sub)
             )
             FeatureItem(
                 iconDrawableRes = R.drawable.person_icon,
-                text = "Biometric unlock",
-                sub = "Fingerprint or face to open"
+                text = stringResource(R.string.onboarding_feature_biometric_title),
+                sub = stringResource(R.string.onboarding_feature_biometric_sub)
             )
         }
     }
@@ -89,7 +90,7 @@ fun FeatureItem(
                 .background(Color(0xFFEEEDFE), RoundedCornerShape(8.dp)),
             contentAlignment = Alignment.Center
         ) {
-            Image(painterResource(iconDrawableRes), "Icon")
+            Image(painterResource(iconDrawableRes), stringResource(R.string.onboarding_feature_icon_desc))
         }
         Column {
             Text(text = text, fontSize = 13.sp, fontWeight = FontWeight(500), color = MaterialTheme.colorScheme.onPrimary)
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingRequestEnablePage.kt b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingRequestEnablePage.kt
index 8e95612..d146781 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingRequestEnablePage.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingRequestEnablePage.kt
@@ -19,6 +19,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import com.longnh15.heimdall.R
@@ -34,7 +35,7 @@ fun OnboardingRequestEnablePage(
         verticalArrangement = Arrangement.spacedBy(32.dp)
     ) {
         OnboardingBadge {
-            Text("Setup · 1 of 2")
+            Text(stringResource(R.string.onboarding_enable_badge))
         }
         Box(
             modifier = Modifier
@@ -44,20 +45,20 @@ fun OnboardingRequestEnablePage(
         ) {
             Image(
                 painterResource(R.drawable.page_icon),
-                "Page icon",
+                stringResource(R.string.onboarding_page_icon_desc),
             )
         }
 
-        Text("Enable autofill", style = MaterialTheme.typography.headlineMedium)
+        Text(stringResource(R.string.onboarding_enable_title), style = MaterialTheme.typography.headlineMedium)
         Text(
-            text = "Let Heimdall fill your passwords automatically. You'll be taken to Android settings — tap Heimdall and you're done.",
+            text = stringResource(R.string.onboarding_enable_body),
             textAlign = TextAlign.Center
         )
 
         Spacer(Modifier.weight(1f))
 
         Button(onClick = onOpenAutofillSettings) {
-            Text("Open settings")
+            Text(stringResource(R.string.open_settings))
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingWelcomePage.kt b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingWelcomePage.kt
index 16e7100..afee0d2 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingWelcomePage.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/onboarding/OnboardingWelcomePage.kt
@@ -16,6 +16,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
@@ -36,12 +37,12 @@ fun OnboardingWelcomePage(modifier: Modifier = Modifier) {
         ) {
             Image(
                 painterResource(R.drawable.shield_icon),
-                "Heimdall Logo",
+                stringResource(R.string.onboarding_welcome_logo_desc),
             )
         }
-        Text("Welcome to Heimdall", style = MaterialTheme.typography.headlineMedium)
+        Text(stringResource(R.string.onboarding_welcome_title), style = MaterialTheme.typography.headlineMedium)
         Text(
-            text = "Your all-seeing guardian for passwords. Secure, private, and always watching over your credentials",
+            text = stringResource(R.string.onboarding_welcome_body),
             textAlign = TextAlign.Center
         )
     }
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/vault/LockOverlay.kt b/app/src/main/java/com/longnh15/heimdall/ui/vault/LockOverlay.kt
index d8f6d60..6628ffa 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/vault/LockOverlay.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/vault/LockOverlay.kt
@@ -19,7 +19,9 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
+import com.longnh15.heimdall.R
 
 @Composable
 fun LockOverlay(
@@ -43,12 +45,12 @@ fun LockOverlay(
                 modifier = Modifier.size(48.dp)
             )
             Text(
-                text = "Vault is locked",
+                text = stringResource(R.string.vault_locked_title),
                 style = MaterialTheme.typography.titleMedium,
                 color = MaterialTheme.colorScheme.onBackground
             )
             Text(
-                text = "Authenticate to access your credentials",
+                text = stringResource(R.string.vault_locked_subtitle),
                 style = MaterialTheme.typography.bodyMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
@@ -60,7 +62,7 @@ fun LockOverlay(
                     modifier = Modifier.size(18.dp)
                 )
                 Spacer(modifier = Modifier.width(8.dp))
-                Text("Unlock with biometrics")
+                Text(stringResource(R.string.vault_unlock_biometrics))
             }
         }
     }
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultHeader.kt b/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultHeader.kt
index 769be45..1da50c2 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultHeader.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultHeader.kt
@@ -17,14 +17,16 @@ import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
+import com.longnh15.heimdall.R
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun VaultHeader() {
     TopAppBar(
         title = {
-            Text("My vault")
+            Text(stringResource(R.string.vault_title))
         },
         colors = TopAppBarDefaults.topAppBarColors().copy(
             containerColor = MaterialTheme.colorScheme.background
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultScreen.kt b/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultScreen.kt
index c6826a2..b98c16f 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultScreen.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/vault/VaultScreen.kt
@@ -13,8 +13,10 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.longnh15.heimdall.R
 
 @Composable
 fun VaultScreen(
@@ -33,12 +35,14 @@ fun VaultScreen(
             }
         }
     )
-    val requestBiometric = remember { {
+    val unlockTitle = stringResource(R.string.vault_unlock_title)
+    val unlockSubtitle = stringResource(R.string.vault_unlock_subtitle)
+    val requestBiometric = remember(unlockTitle, unlockSubtitle) { {
         val request = biometricRequest(
-            title = "Unlock Heimdall",
+            title = unlockTitle,
             AuthenticationRequest.Biometric.Fallback.DeviceCredential,
         ) {
-            setSubtitle("Confirm your identity to access your vault")
+            setSubtitle(unlockSubtitle)
         }
         launcher.launch(request)
     } }
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditEvent.kt b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditEvent.kt
index 9ac9efe..120ec2f 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditEvent.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditEvent.kt
@@ -1,6 +1,8 @@
 package com.longnh15.heimdall.ui.vault.edit
 
+import com.longnh15.heimdall.ui.common.UiText
+
 sealed class AddEditEvent {
     data object SaveSuccess: AddEditEvent()
-    data class SaveError(val message: String): AddEditEvent()
+    data class SaveError(val message: UiText): AddEditEvent()
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditHeader.kt b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditHeader.kt
index 30e890c..62cb259 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditHeader.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditHeader.kt
@@ -20,9 +20,11 @@ import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import com.longnh15.heimdall.R
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -34,7 +36,7 @@ fun AddEditHeader(
 ) {
     TopAppBar(
         title = {
-            Text("New item")
+            Text(stringResource(R.string.add_edit_title))
         },
         modifier = Modifier.padding(end = 16.dp),
         colors = TopAppBarDefaults.topAppBarColors().copy(
@@ -64,7 +66,7 @@ fun AddEditHeader(
                     Spacer(Modifier.width(8.dp))
                 }
                 Text(
-                    text = if (isSaving) "Saving…" else "Save",
+                    text = if (isSaving) stringResource(R.string.add_edit_saving) else stringResource(R.string.add_edit_save),
                     fontSize = 13.sp,
                     fontWeight = FontWeight(500),
                     color = MaterialTheme.colorScheme.onTertiaryContainer
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultItemScreen.kt b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultItemScreen.kt
index b2139f7..a1fe0fd 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultItemScreen.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultItemScreen.kt
@@ -24,10 +24,13 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.focusProperties
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.AndroidUiModes.UI_MODE_NIGHT_YES
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.longnh15.heimdall.R
 import com.longnh15.heimdall.ui.theme.HeimdallTheme
 
 @Composable
@@ -37,12 +40,13 @@ fun AddEditVaultItemScreen(
     popScreen: () -> Unit,
 ) {
     val snackbarHostState = remember { SnackbarHostState() }
+    val context = LocalContext.current
 
     LaunchedEffect(Unit) {
         viewModel.uiEvent.collect { event ->
             when (event) {
                 AddEditEvent.SaveSuccess -> popScreen()
-                is AddEditEvent.SaveError -> snackbarHostState.showSnackbar(event.message)
+                is AddEditEvent.SaveError -> snackbarHostState.showSnackbar(event.message.asString(context))
             }
         }
     }
@@ -66,20 +70,20 @@ fun AddEditVaultItemScreen(
             modifier.padding(paddingValues).padding(horizontal = 16.dp),
             verticalArrangement = Arrangement.spacedBy(10.dp)
         ) {
-            AddEditFormHeader("details")
+            AddEditFormHeader(stringResource(R.string.add_edit_section_details))
             AddEditForm {
                 AddEditFormTextField(
                     value = viewModel.state.name,
                     onValueChange = viewModel::onNameChanged,
-                    label = "Name",
-                    placeholder = "e.g. Google"
+                    label = stringResource(R.string.add_edit_name_label),
+                    placeholder = stringResource(R.string.add_edit_name_placeholder)
                 )
                 AddEditDivider()
                 AddEditFormTextField(
                     value = viewModel.state.url,
                     onValueChange = viewModel::onUrlChanged,
-                    label = "URL",
-                    placeholder = "google.com",
+                    label = stringResource(R.string.add_edit_url_label),
+                    placeholder = stringResource(R.string.add_edit_url_placeholder),
                     actions = {
                         IconButton(
                             onClick = {},
@@ -90,20 +94,20 @@ fun AddEditVaultItemScreen(
                     }
                 )
             }
-            AddEditFormHeader("credentials")
+            AddEditFormHeader(stringResource(R.string.add_edit_section_credentials))
             AddEditForm {
                 AddEditFormTextField(
                     viewModel.state.username,
                     onValueChange = viewModel::onUsernameChanged,
-                    label = "Username",
-                    placeholder = "you@email.com"
+                    label = stringResource(R.string.add_edit_username_label),
+                    placeholder = stringResource(R.string.add_edit_username_placeholder)
                 )
                 AddEditDivider()
                 AddEditFormTextField(
                     value = viewModel.state.password,
                     onValueChange = viewModel::onPasswordChanged,
-                    label = "Password",
-                    placeholder = "••••••••",
+                    label = stringResource(R.string.field_password_label),
+                    placeholder = stringResource(R.string.field_password_placeholder),
                     isHideContent = viewModel.state.isShowPassword.not(),
                     isLastField = true,
                     autoCorrectEnabled = false,
diff --git a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultViewModel.kt b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultViewModel.kt
index 588e489..5697aee 100644
--- a/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultViewModel.kt
+++ b/app/src/main/java/com/longnh15/heimdall/ui/vault/edit/AddEditVaultViewModel.kt
@@ -5,7 +5,9 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.longnh15.heimdall.R
 import com.longnh15.heimdall.domain.repository.CredentialRepository
+import com.longnh15.heimdall.ui.common.UiText
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.launch
@@ -52,7 +54,8 @@ class AddEditVaultViewModel(
                 _uiEvent.send(AddEditEvent.SaveSuccess)
             } catch (e: Exception) {
                 state = state.copy(isSaving = false)
-                _uiEvent.send(AddEditEvent.SaveError(e.message ?: "Something went wrong."))
+                val message = e.message?.let { UiText.Dynamic(it) } ?: UiText.Res(R.string.error_generic)
+                _uiEvent.send(AddEditEvent.SaveError(message))
             }
         }
     }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 0b3f407..938e984 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,91 @@
 <resources>
     <string name="app_name">Heimdall</string>
-</resources>
\ No newline at end of file
+
+    <!-- Errors / validation -->
+    <string name="error_email_required">Email is required</string>
+    <string name="error_email_invalid">Enter a valid email address</string>
+    <string name="error_password_required">Password is required</string>
+    <string name="error_password_too_short">Password must be at least %1$d characters</string>
+    <string name="error_generic">Something went wrong.</string>
+
+    <!-- Shared form fields -->
+    <string name="field_email_label">Email</string>
+    <string name="field_password_label">Password</string>
+    <string name="field_password_placeholder">••••••••</string>
+    <string name="open_settings">Open settings</string>
+
+    <!-- Login -->
+    <string name="login_title">Welcome back</string>
+    <string name="login_subtitle">Access your secure vault credentials</string>
+    <string name="login_email_placeholder">you@email.com</string>
+    <string name="login_forgot_password">Forgot password?</string>
+    <string name="login_button">Login</string>
+    <string name="login_no_account">Don\'t have an account?</string>
+    <string name="login_create_one">Create one</string>
+
+    <!-- Register -->
+    <string name="register_title">Create account</string>
+    <string name="register_subtitle">Secure your digital life with enterprise-grade encryption.</string>
+    <string name="register_name_label">Full name</string>
+    <string name="register_name_placeholder">John Doe</string>
+    <string name="register_email_placeholder">name@vault.com</string>
+    <string name="register_button">Create account</string>
+    <string name="register_terms">By creating an account you agree to our Terms of Service and Privacy Policy.</string>
+    <string name="register_have_account">Already have an account?</string>
+    <string name="register_sign_in">Sign in</string>
+
+    <!-- Onboarding: welcome -->
+    <string name="onboarding_welcome_logo_desc">Heimdall Logo</string>
+    <string name="onboarding_welcome_title">Welcome to Heimdall</string>
+    <string name="onboarding_welcome_body">Your all-seeing guardian for passwords. Secure, private, and always watching over your credentials</string>
+
+    <!-- Onboarding: introduce -->
+    <string name="onboarding_introduce_badge">What you get</string>
+    <string name="onboarding_introduce_title">Everything in one vault</string>
+    <string name="onboarding_introduce_body">Heimdall keeps your passwords safe and fills them in automatically</string>
+    <string name="onboarding_feature_icon_desc">Icon</string>
+    <string name="onboarding_feature_encrypted_title">End-to-end encrypted</string>
+    <string name="onboarding_feature_encrypted_sub">Only you can see your data</string>
+    <string name="onboarding_feature_autofill_title">Autofill anywhere</string>
+    <string name="onboarding_feature_autofill_sub">Works across all your apps</string>
+    <string name="onboarding_feature_biometric_title">Biometric unlock</string>
+    <string name="onboarding_feature_biometric_sub">Fingerprint or face to open</string>
+
+    <!-- Onboarding: request enable -->
+    <string name="onboarding_page_icon_desc">Page icon</string>
+    <string name="onboarding_enable_badge">Setup · 1 of 2</string>
+    <string name="onboarding_enable_title">Enable autofill</string>
+    <string name="onboarding_enable_body">Let Heimdall fill your passwords automatically. You\'ll be taken to Android settings — tap Heimdall and you\'re done.</string>
+
+    <!-- Onboarding: final -->
+    <string name="onboarding_final_badge">You\'re all set</string>
+    <string name="onboarding_final_title">Heimdall is watching</string>
+    <string name="onboarding_final_body">Your vault is ready. Start adding passwords or import from your browser to get going.</string>
+    <string name="onboarding_final_enter_vault">Enter my vault ↗</string>
+
+    <!-- Autofill not enabled dialog -->
+    <string name="autofill_dialog_title">Autofill not enabled</string>
+    <string name="autofill_dialog_body">Heimdall wasn\'t selected as your autofill provider. Open settings and tap Heimdall to enable it.</string>
+    <string name="autofill_dialog_skip">Skip for now</string>
+
+    <!-- Vault -->
+    <string name="vault_title">My vault</string>
+    <string name="vault_unlock_title">Unlock Heimdall</string>
+    <string name="vault_unlock_subtitle">Confirm your identity to access your vault</string>
+    <string name="vault_locked_title">Vault is locked</string>
+    <string name="vault_locked_subtitle">Authenticate to access your credentials</string>
+    <string name="vault_unlock_biometrics">Unlock with biometrics</string>
+
+    <!-- Add / edit vault item -->
+    <string name="add_edit_title">New item</string>
+    <string name="add_edit_saving">Saving…</string>
+    <string name="add_edit_save">Save</string>
+    <string name="add_edit_section_details">details</string>
+    <string name="add_edit_section_credentials">credentials</string>
+    <string name="add_edit_name_label">Name</string>
+    <string name="add_edit_name_placeholder">e.g. Google</string>
+    <string name="add_edit_url_label">URL</string>
+    <string name="add_edit_url_placeholder">google.com</string>
+    <string name="add_edit_username_label">Username</string>
+    <string name="add_edit_username_placeholder">you@email.com</string>
+</resources>