diff --git a/app/src/main/java/dev/kaizen/app/auth/LoginScreen.kt b/app/src/main/java/dev/kaizen/app/auth/LoginScreen.kt
index 15b08af..1cadcf7 100644
--- a/app/src/main/java/dev/kaizen/app/auth/LoginScreen.kt
+++ b/app/src/main/java/dev/kaizen/app/auth/LoginScreen.kt
@@ -52,6 +52,8 @@ import dev.kaizen.app.net.SessionViewModel
 import dev.kaizen.app.ui.theme.Amber
 import dev.kaizen.app.ui.theme.AmberDeep
 import dev.kaizen.app.ui.theme.OnAmber
+import androidx.compose.ui.res.stringResource
+import dev.kaizen.app.R
 import kotlinx.coroutines.launch
 
 /**
@@ -64,6 +66,7 @@ import kotlinx.coroutines.launch
 fun LoginScreen(session: SessionViewModel, modifier: Modifier = Modifier) {
     val cs = MaterialTheme.colorScheme
     val scope = rememberCoroutineScope()
+    val ctx = androidx.compose.ui.platform.LocalContext.current
 
     var baseUrl by remember { mutableStateOf(DEFAULT_BASE_URL) }
     var email by remember { mutableStateOf("") }
@@ -81,9 +84,9 @@ fun LoginScreen(session: SessionViewModel, modifier: Modifier = Modifier) {
         scope.launch {
             when (val result = session.login(baseUrl, email, password, deviceName)) {
                 is LoginResult.Success -> Unit // session.config flips → MainActivity routes to chat
-                LoginResult.InvalidCredentials -> error = "E-Mail oder Passwort ist falsch."
-                LoginResult.RateLimited -> error = "Zu viele Versuche. Bitte kurz warten."
-                is LoginResult.Error -> error = "Verbindung fehlgeschlagen. Server-Adresse prüfen."
+                LoginResult.InvalidCredentials -> error = ctx.getString(R.string.login_error_credentials)
+                LoginResult.RateLimited -> error = ctx.getString(R.string.login_error_rate_limited)
+                is LoginResult.Error -> error = ctx.getString(R.string.login_error_connection)
             }
             loading = false
         }
@@ -102,10 +105,10 @@ fun LoginScreen(session: SessionViewModel, modifier: Modifier = Modifier) {
             Spacer(Modifier.size(64.dp))
             KaizenOrb(96.dp)
             Spacer(Modifier.size(24.dp))
-            Text("Willkommen", color = cs.onBackground, fontSize = 30.sp, fontWeight = FontWeight.Bold)
+            Text(stringResource(R.string.login_welcome), color = cs.onBackground, fontSize = 30.sp, fontWeight = FontWeight.Bold)
             Spacer(Modifier.size(6.dp))
             Text(
-                "Melde dich bei deiner Kaizen-Instanz an",
+                stringResource(R.string.login_subtitle),
                 color = cs.onSurfaceVariant.copy(alpha = 0.8f),
                 fontSize = 14.sp,
             )
@@ -115,7 +118,7 @@ fun LoginScreen(session: SessionViewModel, modifier: Modifier = Modifier) {
             GlassField(
                 value = baseUrl,
                 onValueChange = { baseUrl = it; error = null },
-                placeholder = "https://deine-instanz.de",
+                placeholder = stringResource(R.string.login_url_placeholder),
                 keyboardType = KeyboardType.Uri,
                 imeAction = ImeAction.Next,
             )
@@ -123,7 +126,7 @@ fun LoginScreen(session: SessionViewModel, modifier: Modifier = Modifier) {
             GlassField(
                 value = email,
                 onValueChange = { email = it; error = null },
-                placeholder = "E-Mail",
+                placeholder = stringResource(R.string.login_email_placeholder),
                 keyboardType = KeyboardType.Email,
                 imeAction = ImeAction.Next,
             )
@@ -131,7 +134,7 @@ fun LoginScreen(session: SessionViewModel, modifier: Modifier = Modifier) {
             GlassField(
                 value = password,
                 onValueChange = { password = it; error = null },
-                placeholder = "Passwort",
+                placeholder = stringResource(R.string.login_password_placeholder),
                 keyboardType = KeyboardType.Password,
                 imeAction = ImeAction.Done,
                 password = true,
@@ -227,7 +230,7 @@ private fun SignInButton(enabled: Boolean, loading: Boolean, onClick: () -> Unit
             CircularProgressIndicator(color = OnAmber, strokeWidth = 2.4.dp, modifier = Modifier.size(22.dp))
         } else {
             Text(
-                "Anmelden",
+                stringResource(R.string.login_submit),
                 color = if (enabled) OnAmber else cs.onSurfaceVariant,
                 fontSize = 16.sp,
                 fontWeight = FontWeight.SemiBold,
diff --git a/app/src/main/java/dev/kaizen/app/chat/ChatComponents.kt b/app/src/main/java/dev/kaizen/app/chat/ChatComponents.kt
index 01c70a7..99467f3 100644
--- a/app/src/main/java/dev/kaizen/app/chat/ChatComponents.kt
+++ b/app/src/main/java/dev/kaizen/app/chat/ChatComponents.kt
@@ -67,6 +67,8 @@ import dev.kaizen.app.ui.shape.KaizenShapes
 import dev.kaizen.app.ui.theme.Amber
 import dev.kaizen.app.ui.theme.AmberDeep
 import dev.kaizen.app.ui.theme.OnAmber
+import dev.kaizen.app.R
+import androidx.compose.ui.res.stringResource
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
 import java.util.Locale
@@ -122,7 +124,6 @@ fun EmptyHero(userName: String, onPick: (String) -> Unit, modifier: Modifier = M
         now.format(DateTimeFormatter.ofPattern("EEE, d. MMMM · HH:mm", Locale.GERMAN))
     }
 
-    // DESIGN.md §11.1: no suggestion chips on mobile — redundant with mode pills
     Column(
         modifier = modifier
             .fillMaxSize()
@@ -135,7 +136,7 @@ fun EmptyHero(userName: String, onPick: (String) -> Unit, modifier: Modifier = M
         Spacer(Modifier.height(24.dp))
         Text("${greeting(now.hour)}, $userName", color = cs.onSurfaceVariant, fontSize = 17.sp)
         Spacer(Modifier.height(6.dp))
-        Text("Was liegt an?", color = cs.onBackground, fontSize = 32.sp, fontWeight = FontWeight.Bold)
+        Text(stringResource(R.string.hero_headline), color = cs.onBackground, fontSize = 32.sp, fontWeight = FontWeight.Bold)
         Spacer(Modifier.height(8.dp))
         Text(dateLine, color = cs.onSurfaceVariant.copy(alpha = 0.7f), fontSize = 13.sp)
         Spacer(Modifier.height(142.dp))
@@ -143,7 +144,7 @@ fun EmptyHero(userName: String, onPick: (String) -> Unit, modifier: Modifier = M
 }
 
 @Composable
-fun ModePillsRow(selected: String, onSelect: (String) -> Unit, modifier: Modifier = Modifier) {
+fun ModePillsRow(selected: Int, onSelect: (Int) -> Unit, modifier: Modifier = Modifier) {
     val cs = MaterialTheme.colorScheme
     val isDark = isSystemInDarkTheme()
 
@@ -163,7 +164,8 @@ fun ModePillsRow(selected: String, onSelect: (String) -> Unit, modifier: Modifie
         horizontalArrangement = Arrangement.spacedBy(8.dp),
     ) {
         chatModes.forEach { mode ->
-            val active = mode.label == selected
+            val label = stringResource(mode.labelRes)
+            val active = mode.labelRes == selected
             val backgroundFill = if (active) Amber.copy(alpha = 0.16f)
             else if (isDark) Color(0x12FFFFFF) else Color(0x82FFFFFF)
             val borderBrush = if (active) glassBorderActive else glassBorderInactive
@@ -173,13 +175,13 @@ fun ModePillsRow(selected: String, onSelect: (String) -> Unit, modifier: Modifie
                     .clip(KaizenShapes.pill)
                     .background(backgroundFill)
                     .border(1.2.dp, borderBrush, KaizenShapes.pill)
-                    .clickable { onSelect(mode.label) }
+                    .clickable { onSelect(mode.labelRes) }
                     .padding(horizontal = 13.dp, vertical = 8.dp),
                 verticalAlignment = Alignment.CenterVertically,
             ) {
                 Icon(mode.icon, null, tint = if (active) Amber else cs.onSurfaceVariant, modifier = Modifier.size(16.dp))
                 Spacer(Modifier.width(6.dp))
-                Text(mode.label, color = if (active) cs.onBackground else cs.onSurfaceVariant, fontSize = 13.sp, fontWeight = FontWeight.Medium)
+                Text(label, color = if (active) cs.onBackground else cs.onSurfaceVariant, fontSize = 13.sp, fontWeight = FontWeight.Medium)
             }
         }
     }
@@ -296,10 +298,10 @@ fun ChatInput(
             }
             Row(Modifier.padding(horizontal = 8.dp, vertical = 8.dp), verticalAlignment = Alignment.CenterVertically) {
                 Box(Modifier.size(40.dp).clip(KaizenShapes.circle).clickable(onClick = onAddClick), contentAlignment = Alignment.Center) {
-                    Icon(Icons.Rounded.Add, "Anhang", tint = cs.onSurfaceVariant, modifier = Modifier.size(22.dp))
+                    Icon(Icons.Rounded.Add, stringResource(R.string.chat_attachment), tint = cs.onSurfaceVariant, modifier = Modifier.size(22.dp))
                 }
                 Box(Modifier.weight(1f).heightIn(min = 36.dp).padding(horizontal = 4.dp), contentAlignment = Alignment.CenterStart) {
-                    if (value.isEmpty()) Text("Nachricht eingeben …", color = cs.onSurfaceVariant, fontSize = 16.sp)
+                    if (value.isEmpty()) Text(stringResource(R.string.chat_input_placeholder), color = cs.onSurfaceVariant, fontSize = 16.sp)
                     BasicTextField(
                         value = value, onValueChange = onValueChange,
                         textStyle = TextStyle(color = cs.onBackground, fontSize = 16.sp, lineHeight = 22.sp),
diff --git a/app/src/main/java/dev/kaizen/app/chat/ChatModels.kt b/app/src/main/java/dev/kaizen/app/chat/ChatModels.kt
index 8a94a3e..6ad8e15 100644
--- a/app/src/main/java/dev/kaizen/app/chat/ChatModels.kt
+++ b/app/src/main/java/dev/kaizen/app/chat/ChatModels.kt
@@ -8,7 +8,10 @@ import androidx.compose.material.icons.rounded.Language
 import androidx.compose.material.icons.rounded.Movie
 import androidx.compose.material.icons.rounded.MusicNote
 import androidx.compose.material.icons.rounded.Tune
+import androidx.compose.runtime.Composable
 import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.res.stringResource
+import dev.kaizen.app.R
 import dev.kaizen.app.net.Attachment
 
 enum class Role { User, Assistant }
@@ -23,31 +26,30 @@ data class Message(
     val attachments: List<Attachment> = emptyList(),
 )
 
-// Empty-state suggestion pills (mirrors the web hero)
-data class Suggestion(val label: String, val prompt: String, val icon: ImageVector)
+data class Suggestion(val labelRes: Int, val promptRes: Int, val icon: ImageVector)
 
 val suggestions = listOf(
-    Suggestion("Brainstormen", "Lass uns zu einem Thema brainstormen.", Icons.Rounded.AutoAwesome),
-    Suggestion("Bild generieren", "Generiere ein Bild von einem Bergsee bei Sonnenaufgang.", Icons.Rounded.Image),
-    Suggestion("Video erstellen", "Erstelle ein kurzes Video von einer Stadt bei Nacht.", Icons.Rounded.Movie),
-    Suggestion("Web durchsuchen", "Durchsuche das Web nach den neuesten KI-Nachrichten.", Icons.Rounded.Language),
+    Suggestion(R.string.suggest_brainstorm, R.string.suggest_brainstorm_prompt, Icons.Rounded.AutoAwesome),
+    Suggestion(R.string.suggest_image, R.string.suggest_image_prompt, Icons.Rounded.Image),
+    Suggestion(R.string.suggest_video, R.string.suggest_video_prompt, Icons.Rounded.Movie),
+    Suggestion(R.string.suggest_web, R.string.suggest_web_prompt, Icons.Rounded.Language),
 )
 
-// Mode pills above the input (visual only in Phase 0)
-data class ChatMode(val label: String, val icon: ImageVector)
+data class ChatMode(val labelRes: Int, val icon: ImageVector)
 
 val chatModes = listOf(
-    ChatMode("Standard", Icons.Rounded.Adjust),
-    ChatMode("Sampling", Icons.Rounded.Tune),
-    ChatMode("Bild", Icons.Rounded.Image),
-    ChatMode("Suche", Icons.Rounded.Language),
-    ChatMode("Video", Icons.Rounded.Movie),
-    ChatMode("Audio", Icons.Rounded.MusicNote),
+    ChatMode(R.string.mode_standard, Icons.Rounded.Adjust),
+    ChatMode(R.string.mode_sampling, Icons.Rounded.Tune),
+    ChatMode(R.string.mode_image, Icons.Rounded.Image),
+    ChatMode(R.string.mode_search, Icons.Rounded.Language),
+    ChatMode(R.string.mode_video, Icons.Rounded.Movie),
+    ChatMode(R.string.mode_audio, Icons.Rounded.MusicNote),
 )
 
+@Composable
 fun greeting(hour: Int): String = when (hour) {
-    in 5..11 -> "Guten Morgen"
-    in 12..17 -> "Guten Tag"
-    in 18..22 -> "Guten Abend"
-    else -> "Hallo"
+    in 5..11 -> stringResource(R.string.greeting_morning)
+    in 12..17 -> stringResource(R.string.greeting_day)
+    in 18..22 -> stringResource(R.string.greeting_evening)
+    else -> stringResource(R.string.greeting_night)
 }
diff --git a/app/src/main/java/dev/kaizen/app/chat/ChatScreen.kt b/app/src/main/java/dev/kaizen/app/chat/ChatScreen.kt
index 980741c..9146d0f 100644
--- a/app/src/main/java/dev/kaizen/app/chat/ChatScreen.kt
+++ b/app/src/main/java/dev/kaizen/app/chat/ChatScreen.kt
@@ -54,6 +54,7 @@ import dev.kaizen.app.ui.effect.GlassSurface
 import dev.kaizen.app.ui.effect.GlassTiers
 import dev.kaizen.app.ui.effect.KaizenShadows
 import dev.kaizen.app.ui.shape.KaizenShapes
+import dev.kaizen.app.R
 import dev.kaizen.app.db.MessageEntity
 import dev.kaizen.app.db.toEntity
 import dev.kaizen.app.haptics.rememberHaptics
@@ -93,7 +94,7 @@ fun ChatScreen(
     var input by remember { mutableStateOf("") }
     var isStreaming by remember { mutableStateOf(false) }
     var nextId by remember { mutableStateOf(0L) }
-    var selectedMode by remember { mutableStateOf("Standard") }
+    var selectedMode by remember { mutableStateOf(R.string.mode_standard) }
 
     // Navigation State
     var currentScreen by remember { mutableStateOf(AppScreen.Chat) }
@@ -315,11 +316,11 @@ fun ChatScreen(
                 val idx = messages.indexOfLast { it.id == assistantId }
                 if (idx >= 0) {
                     val existing = messages[idx].content
-                    val errorSuffix = "\n\n⚠ ${chatErrorText(e)}"
+                    val errorSuffix = "\n\n⚠ ${chatErrorText(e, context)}"
                     messages[idx] = messages[idx].copy(
                         streaming = false,
                         thinking = false,
-                        content = if (existing.isNotBlank()) existing + errorSuffix else chatErrorText(e),
+                        content = if (existing.isNotBlank()) existing + errorSuffix else chatErrorText(e, context),
                     )
                 }
             } finally {
@@ -437,7 +438,7 @@ fun ChatScreen(
                                 Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
                                     Icon(
                                         imageVector = Icons.Rounded.Menu,
-                                        contentDescription = "Menü öffnen",
+                                        contentDescription = context.getString(R.string.chat_open_menu),
                                         tint = MaterialTheme.colorScheme.onBackground,
                                         modifier = Modifier.size(20.dp)
                                     )
@@ -511,11 +512,10 @@ fun ChatScreen(
     }
 }
 
-/** Maps a streaming failure to a short, human German message shown in the bubble. */
-private fun chatErrorText(e: Throwable): String = when {
-    e is ChatHttpException && e.code == 401 -> "Sitzung abgelaufen. Bitte erneut anmelden."
-    e is ChatHttpException && e.code == 402 -> "Guthaben aufgebraucht."
-    e is ChatHttpException && e.code == 429 -> "Zu viele Anfragen. Kurz warten."
-    e is ChatHttpException -> "Fehler vom Server (${e.code})."
-    else -> "Keine Verbindung zum Server."
+private fun chatErrorText(e: Throwable, ctx: android.content.Context): String = when {
+    e is ChatHttpException && e.code == 401 -> ctx.getString(R.string.error_session_expired)
+    e is ChatHttpException && e.code == 402 -> ctx.getString(R.string.error_credits_exhausted)
+    e is ChatHttpException && e.code == 429 -> ctx.getString(R.string.error_rate_limited)
+    e is ChatHttpException -> ctx.getString(R.string.error_server, e.code)
+    else -> ctx.getString(R.string.error_no_connection)
 }
diff --git a/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt b/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt
index fa83f15..4b9dd5d 100644
--- a/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt
+++ b/app/src/main/java/dev/kaizen/app/chat/Sidebar.kt
@@ -45,29 +45,33 @@ import dev.kaizen.app.ui.effect.GlassSurface
 import dev.kaizen.app.ui.effect.GlassTiers
 import dev.kaizen.app.ui.effect.KaizenShadows
 import dev.kaizen.app.ui.shape.KaizenShapes
+import dev.kaizen.app.R
 import dev.kaizen.app.ui.theme.Amber
+import androidx.compose.ui.res.stringResource
 import java.time.Instant
 import java.time.LocalDate
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
 import java.util.Locale
 
-private fun dateLabel(updatedAt: String?): String {
-    val instant = runCatching { Instant.parse(updatedAt) }.getOrNull() ?: return "FRÜHER"
+private data class DateLabels(val today: String, val yesterday: String, val earlier: String, val pinned: String)
+
+private fun dateLabel(updatedAt: String?, labels: DateLabels): String {
+    val instant = runCatching { Instant.parse(updatedAt) }.getOrNull() ?: return labels.earlier
     val date = instant.atZone(ZoneId.systemDefault()).toLocalDate()
     val today = LocalDate.now()
     return when (date) {
-        today -> "HEUTE"
-        today.minusDays(1) -> "GESTERN"
-        else -> date.format(DateTimeFormatter.ofPattern("dd. MMM yyyy", Locale.GERMAN)).uppercase()
+        today -> labels.today
+        today.minusDays(1) -> labels.yesterday
+        else -> date.format(DateTimeFormatter.ofPattern("dd. MMM yyyy", Locale.getDefault())).uppercase()
     }
 }
 
-private fun groupConversations(conversations: List<ConversationSummary>): Map<String, List<ConversationSummary>> {
+private fun groupConversations(conversations: List<ConversationSummary>, labels: DateLabels): Map<String, List<ConversationSummary>> {
     val groups = LinkedHashMap<String, MutableList<ConversationSummary>>()
-    conversations.filter { it.pinned }.takeIf { it.isNotEmpty() }?.let { groups["★ ANGEHEFTET"] = it.toMutableList() }
+    conversations.filter { it.pinned }.takeIf { it.isNotEmpty() }?.let { groups[labels.pinned] = it.toMutableList() }
     conversations.filterNot { it.pinned }.forEach {
-        groups.getOrPut(dateLabel(it.updatedAt)) { mutableListOf() }.add(it)
+        groups.getOrPut(dateLabel(it.updatedAt, labels)) { mutableListOf() }.add(it)
     }
     return groups
 }
@@ -109,7 +113,7 @@ fun KaizenSidebar(
                 horizontalArrangement = Arrangement.SpaceBetween,
                 verticalAlignment = Alignment.CenterVertically
             ) {
-                Text("kaizen", color = cs.onBackground, fontSize = 20.sp, fontWeight = FontWeight.Bold)
+                Text(stringResource(R.string.sidebar_brand), color = cs.onBackground, fontSize = 20.sp, fontWeight = FontWeight.Bold)
                 Box(
                     modifier = Modifier
                         .size(36.dp)
@@ -118,7 +122,7 @@ fun KaizenSidebar(
                         .clickable { onNewChat() },
                     contentAlignment = Alignment.Center
                 ) {
-                    Icon(Icons.Rounded.Edit, "Neuer Chat", tint = cs.onBackground, modifier = Modifier.size(18.dp))
+                    Icon(Icons.Rounded.Edit, stringResource(R.string.chat_new), tint = cs.onBackground, modifier = Modifier.size(18.dp))
                 }
             }
 
@@ -136,7 +140,7 @@ fun KaizenSidebar(
             ) {
                 Icon(Icons.Rounded.Search, null, tint = cs.onSurfaceVariant.copy(alpha = 0.6f), modifier = Modifier.size(18.dp))
                 Spacer(Modifier.width(8.dp))
-                Text("Suchen...", color = cs.onSurfaceVariant.copy(alpha = 0.6f), fontSize = 14.sp)
+                Text(stringResource(R.string.chat_search), color = cs.onSurfaceVariant.copy(alpha = 0.6f), fontSize = 14.sp)
             }
 
             Spacer(Modifier.height(24.dp))
@@ -145,13 +149,19 @@ fun KaizenSidebar(
             Box(Modifier.weight(1f).fillMaxWidth()) {
                 if (conversations.isEmpty()) {
                     Text(
-                        "Noch keine Chats",
+                        stringResource(R.string.chat_no_conversations),
                         color = cs.onSurfaceVariant.copy(alpha = 0.5f),
                         fontSize = 14.sp,
                         modifier = Modifier.padding(start = 12.dp, top = 12.dp)
                     )
                 } else {
-                    val grouped = remember(conversations) { groupConversations(conversations) }
+                    val labels = DateLabels(
+                        today = stringResource(R.string.sidebar_today),
+                        yesterday = stringResource(R.string.sidebar_yesterday),
+                        earlier = stringResource(R.string.sidebar_earlier),
+                        pinned = stringResource(R.string.sidebar_pinned),
+                    )
+                    val grouped = remember(conversations, labels) { groupConversations(conversations, labels) }
                     LazyColumn(
                         modifier = Modifier.fillMaxSize(),
                         verticalArrangement = Arrangement.spacedBy(8.dp)
@@ -207,7 +217,7 @@ fun KaizenSidebar(
                 Column(Modifier.weight(1f)) {
                     Text(userName, color = cs.onBackground, fontSize = 15.sp, fontWeight = FontWeight.SemiBold)
                 }
-                Icon(Icons.Rounded.Settings, "Einstellungen", tint = cs.onSurfaceVariant.copy(alpha = 0.7f), modifier = Modifier.size(20.dp))
+                Icon(Icons.Rounded.Settings, stringResource(R.string.sidebar_settings), tint = cs.onSurfaceVariant.copy(alpha = 0.7f), modifier = Modifier.size(20.dp))
             }
 
             Spacer(Modifier.height(10.dp))
@@ -221,9 +231,9 @@ fun KaizenSidebar(
                     .padding(horizontal = 12.dp, vertical = 10.dp),
                 verticalAlignment = Alignment.CenterVertically
             ) {
-                Icon(Icons.AutoMirrored.Rounded.Logout, "Abmelden", tint = cs.onSurfaceVariant.copy(alpha = 0.7f), modifier = Modifier.size(18.dp))
+                Icon(Icons.AutoMirrored.Rounded.Logout, stringResource(R.string.sidebar_logout), tint = cs.onSurfaceVariant.copy(alpha = 0.7f), modifier = Modifier.size(18.dp))
                 Spacer(Modifier.width(10.dp))
-                Text("Abmelden", color = cs.onSurfaceVariant.copy(alpha = 0.85f), fontSize = 14.sp, fontWeight = FontWeight.Medium)
+                Text(stringResource(R.string.sidebar_logout), color = cs.onSurfaceVariant.copy(alpha = 0.85f), fontSize = 14.sp, fontWeight = FontWeight.Medium)
             }
         }
     }
@@ -260,7 +270,7 @@ private fun HistoryItemRow(item: ConversationSummary, selected: Boolean, onClick
             Spacer(Modifier.width(8.dp))
         }
         Text(
-            text = if (item.locked) "Gesperrter Chat" else item.title,
+            text = if (item.locked) stringResource(R.string.chat_locked) else item.title,
             color = if (item.locked) cs.onSurfaceVariant.copy(alpha = 0.5f) else cs.onBackground,
             fontSize = 14.sp,
             fontWeight = FontWeight.Medium,
@@ -269,7 +279,7 @@ private fun HistoryItemRow(item: ConversationSummary, selected: Boolean, onClick
         )
         if (item.locked) {
             Spacer(Modifier.width(8.dp))
-            Icon(Icons.Rounded.Lock, "Gesperrt", tint = Amber, modifier = Modifier.size(15.dp))
+            Icon(Icons.Rounded.Lock, stringResource(R.string.chat_locked_badge), tint = Amber, modifier = Modifier.size(15.dp))
         }
     }
 }
diff --git a/app/src/main/res/values-en/strings.xml b/app/src/main/res/values-en/strings.xml
new file mode 100644
index 0000000..224869a
--- /dev/null
+++ b/app/src/main/res/values-en/strings.xml
@@ -0,0 +1,94 @@
+<resources>
+    <!-- Greeting -->
+    <string name="greeting_morning">Good Morning</string>
+    <string name="greeting_day">Good Afternoon</string>
+    <string name="greeting_evening">Good Evening</string>
+    <string name="greeting_night">Hello</string>
+    <string name="hero_headline">What\'s up?</string>
+
+    <!-- Chat -->
+    <string name="chat_input_placeholder">Type a message …</string>
+    <string name="chat_no_conversations">No chats yet</string>
+    <string name="chat_locked">Locked Chat</string>
+    <string name="chat_locked_badge">Locked</string>
+    <string name="chat_new">New Chat</string>
+    <string name="chat_search">Search…</string>
+    <string name="chat_attachment">Attachment</string>
+    <string name="chat_call">Call</string>
+    <string name="chat_remove">Remove</string>
+    <string name="chat_error">Error</string>
+    <string name="chat_open_menu">Open menu</string>
+
+    <!-- Chat errors -->
+    <string name="error_session_expired">Session expired. Please sign in again.</string>
+    <string name="error_credits_exhausted">Credits exhausted.</string>
+    <string name="error_rate_limited">Too many requests. Please wait.</string>
+    <string name="error_server">Server error (%1$d).</string>
+    <string name="error_no_connection">No connection to server.</string>
+
+    <!-- Mode pills -->
+    <string name="mode_standard">Standard</string>
+    <string name="mode_sampling">Sampling</string>
+    <string name="mode_image">Image</string>
+    <string name="mode_search">Search</string>
+    <string name="mode_video">Video</string>
+    <string name="mode_audio">Audio</string>
+
+    <!-- Suggestion pills -->
+    <string name="suggest_brainstorm">Brainstorm</string>
+    <string name="suggest_brainstorm_prompt">Let\'s brainstorm on a topic.</string>
+    <string name="suggest_image">Generate Image</string>
+    <string name="suggest_image_prompt">Generate an image of a mountain lake at sunrise.</string>
+    <string name="suggest_video">Create Video</string>
+    <string name="suggest_video_prompt">Create a short video of a city at night.</string>
+    <string name="suggest_web">Search the Web</string>
+    <string name="suggest_web_prompt">Search the web for the latest AI news.</string>
+
+    <!-- Sidebar -->
+    <string name="sidebar_brand">kaizen</string>
+    <string name="sidebar_pinned">★ PINNED</string>
+    <string name="sidebar_today">TODAY</string>
+    <string name="sidebar_yesterday">YESTERDAY</string>
+    <string name="sidebar_earlier">EARLIER</string>
+    <string name="sidebar_logout">Sign Out</string>
+    <string name="sidebar_settings">Settings</string>
+
+    <!-- Model sheet -->
+    <string name="model_sheet_title">Select Model</string>
+    <string name="model_search_placeholder">Search models…</string>
+    <string name="model_search_clear">Clear</string>
+    <string name="model_connecting">Connecting…</string>
+    <string name="model_no_results">No matches</string>
+    <string name="model_favorite">Favorite</string>
+    <string name="model_selected">Selected</string>
+    <string name="model_favorites_group">★ Favorites</string>
+
+    <!-- Login -->
+    <string name="login_welcome">Welcome</string>
+    <string name="login_subtitle">Sign in to your Kaizen instance</string>
+    <string name="login_url_placeholder">https://your-instance.com</string>
+    <string name="login_email_placeholder">Email</string>
+    <string name="login_password_placeholder">Password</string>
+    <string name="login_submit">Sign In</string>
+    <string name="login_error_credentials">Invalid email or password.</string>
+    <string name="login_error_rate_limited">Too many attempts. Please wait.</string>
+    <string name="login_error_connection">Connection failed. Check server address.</string>
+
+    <!-- Settings -->
+    <string name="settings_title">Settings</string>
+    <string name="settings_back">Back</string>
+    <string name="settings_section_appearance">APPEARANCE</string>
+    <string name="settings_section_profile">PROFILE &amp; ACCOUNT</string>
+    <string name="settings_section_ai">AI PROFILE &amp; CONTEXT</string>
+    <string name="settings_accent_title">Accent Color</string>
+    <string name="settings_accent_desc">Choose the app color scheme</string>
+    <string name="settings_appearance_title">Appearance</string>
+    <string name="settings_appearance_desc">Set light/dark appearance</string>
+    <string name="settings_name_title">Display Name</string>
+    <string name="settings_name_desc">Change your display name</string>
+    <string name="settings_email_title">Email Address</string>
+    <string name="settings_ai_title">System Prompt &amp; Facts</string>
+    <string name="settings_appearance_light">Light</string>
+    <string name="settings_appearance_dark">Dark</string>
+    <string name="settings_appearance_system">System</string>
+</resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index a679dc3..b0df167 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,96 @@
 <resources>
     <string name="app_name">Kaizen</string>
-</resources>
\ No newline at end of file
+
+    <!-- Greeting -->
+    <string name="greeting_morning">Guten Morgen</string>
+    <string name="greeting_day">Guten Tag</string>
+    <string name="greeting_evening">Guten Abend</string>
+    <string name="greeting_night">Hallo</string>
+    <string name="hero_headline">Was liegt an?</string>
+
+    <!-- Chat -->
+    <string name="chat_input_placeholder">Nachricht eingeben …</string>
+    <string name="chat_no_conversations">Noch keine Chats</string>
+    <string name="chat_locked">Gesperrter Chat</string>
+    <string name="chat_locked_badge">Gesperrt</string>
+    <string name="chat_new">Neuer Chat</string>
+    <string name="chat_search">Suchen…</string>
+    <string name="chat_attachment">Anhang</string>
+    <string name="chat_call">Anruf</string>
+    <string name="chat_remove">Entfernen</string>
+    <string name="chat_error">Fehler</string>
+    <string name="chat_open_menu">Menü öffnen</string>
+
+    <!-- Chat errors -->
+    <string name="error_session_expired">Sitzung abgelaufen. Bitte erneut anmelden.</string>
+    <string name="error_credits_exhausted">Guthaben aufgebraucht.</string>
+    <string name="error_rate_limited">Zu viele Anfragen. Kurz warten.</string>
+    <string name="error_server">Fehler vom Server (%1$d).</string>
+    <string name="error_no_connection">Keine Verbindung zum Server.</string>
+
+    <!-- Mode pills -->
+    <string name="mode_standard">Standard</string>
+    <string name="mode_sampling">Sampling</string>
+    <string name="mode_image">Bild</string>
+    <string name="mode_search">Suche</string>
+    <string name="mode_video">Video</string>
+    <string name="mode_audio">Audio</string>
+
+    <!-- Suggestion pills -->
+    <string name="suggest_brainstorm">Brainstormen</string>
+    <string name="suggest_brainstorm_prompt">Lass uns zu einem Thema brainstormen.</string>
+    <string name="suggest_image">Bild generieren</string>
+    <string name="suggest_image_prompt">Generiere ein Bild von einem Bergsee bei Sonnenaufgang.</string>
+    <string name="suggest_video">Video erstellen</string>
+    <string name="suggest_video_prompt">Erstelle ein kurzes Video von einer Stadt bei Nacht.</string>
+    <string name="suggest_web">Web durchsuchen</string>
+    <string name="suggest_web_prompt">Durchsuche das Web nach den neuesten KI-Nachrichten.</string>
+
+    <!-- Sidebar -->
+    <string name="sidebar_brand">kaizen</string>
+    <string name="sidebar_pinned">★ ANGEHEFTET</string>
+    <string name="sidebar_today">HEUTE</string>
+    <string name="sidebar_yesterday">GESTERN</string>
+    <string name="sidebar_earlier">FRÜHER</string>
+    <string name="sidebar_logout">Abmelden</string>
+    <string name="sidebar_settings">Einstellungen</string>
+
+    <!-- Model sheet -->
+    <string name="model_sheet_title">Modell auswählen</string>
+    <string name="model_search_placeholder">Modell suchen…</string>
+    <string name="model_search_clear">Löschen</string>
+    <string name="model_connecting">Verbindung wird hergestellt…</string>
+    <string name="model_no_results">Keine Treffer</string>
+    <string name="model_favorite">Favorit</string>
+    <string name="model_selected">Ausgewählt</string>
+    <string name="model_favorites_group">★ Favoriten</string>
+
+    <!-- Login -->
+    <string name="login_welcome">Willkommen</string>
+    <string name="login_subtitle">Melde dich bei deiner Kaizen-Instanz an</string>
+    <string name="login_url_placeholder">https://deine-instanz.de</string>
+    <string name="login_email_placeholder">E-Mail</string>
+    <string name="login_password_placeholder">Passwort</string>
+    <string name="login_submit">Anmelden</string>
+    <string name="login_error_credentials">E-Mail oder Passwort ist falsch.</string>
+    <string name="login_error_rate_limited">Zu viele Versuche. Bitte kurz warten.</string>
+    <string name="login_error_connection">Verbindung fehlgeschlagen. Server-Adresse prüfen.</string>
+
+    <!-- Settings -->
+    <string name="settings_title">Einstellungen</string>
+    <string name="settings_back">Zurück</string>
+    <string name="settings_section_appearance">ERSCHEINUNGSBILD</string>
+    <string name="settings_section_profile">PROFIL &amp; KONTO</string>
+    <string name="settings_section_ai">KI-PROFIL &amp; KONTEXT</string>
+    <string name="settings_accent_title">Akzentfarbe</string>
+    <string name="settings_accent_desc">Wähle das Farbschema der App</string>
+    <string name="settings_appearance_title">Helligkeitsmodus</string>
+    <string name="settings_appearance_desc">Passe das Hell/Dunkel-Erscheinungsbild an</string>
+    <string name="settings_name_title">Benutzername</string>
+    <string name="settings_name_desc">Ändere deinen Anzeigenamen</string>
+    <string name="settings_email_title">E-Mail-Adresse</string>
+    <string name="settings_ai_title">System-Prompt &amp; Fakten</string>
+    <string name="settings_appearance_light">Hell</string>
+    <string name="settings_appearance_dark">Dunkel</string>
+    <string name="settings_appearance_system">System</string>
+</resources>