diff --git a/apps/rebreak-binder-mac/.gitignore b/apps/rebreak-magic-mac/.gitignore
similarity index 100%
rename from apps/rebreak-binder-mac/.gitignore
rename to apps/rebreak-magic-mac/.gitignore
diff --git a/apps/rebreak-binder-mac/README.md b/apps/rebreak-magic-mac/README.md
similarity index 100%
rename from apps/rebreak-binder-mac/README.md
rename to apps/rebreak-magic-mac/README.md
diff --git a/apps/rebreak-binder-mac/Sources/Models/DeviceState.swift b/apps/rebreak-magic-mac/Sources/Models/DeviceState.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Models/DeviceState.swift
rename to apps/rebreak-magic-mac/Sources/Models/DeviceState.swift
diff --git a/apps/rebreak-binder-mac/Sources/Models/WizardModel.swift b/apps/rebreak-magic-mac/Sources/Models/WizardModel.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Models/WizardModel.swift
rename to apps/rebreak-magic-mac/Sources/Models/WizardModel.swift
diff --git a/apps/rebreak-binder-mac/Sources/Models/WizardStep.swift b/apps/rebreak-magic-mac/Sources/Models/WizardStep.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Models/WizardStep.swift
rename to apps/rebreak-magic-mac/Sources/Models/WizardStep.swift
diff --git a/apps/rebreak-binder-mac/Sources/RebreakBinderApp.swift b/apps/rebreak-magic-mac/Sources/RebreakMagicApp.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/RebreakBinderApp.swift
rename to apps/rebreak-magic-mac/Sources/RebreakMagicApp.swift
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AccentColor.colorset/Contents.json b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AccentColor.colorset/Contents.json
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rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AccentColor.colorset/Contents.json
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AccentColor.colorset/Contents.json
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128@2x.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128@2x.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128@2x.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_128x128@2x.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16@2x.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16@2x.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16@2x.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_16x16@2x.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256@2x.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256@2x.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256@2x.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_256x256@2x.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32@2x.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32@2x.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32@2x.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_32x32@2x.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512@2x.png b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512@2x.png
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512@2x.png
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/AppIcon.appiconset/icon_512x512@2x.png
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/Contents.json b/apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/Contents.json
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Assets.xcassets/Contents.json
rename to apps/rebreak-magic-mac/Sources/Resources/Assets.xcassets/Contents.json
diff --git a/apps/rebreak-binder-mac/Sources/Resources/Info.plist b/apps/rebreak-magic-mac/Sources/Resources/Info.plist
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Resources/Info.plist
rename to apps/rebreak-magic-mac/Sources/Resources/Info.plist
diff --git a/apps/rebreak-binder-mac/Sources/Services/DeviceDetector.swift b/apps/rebreak-magic-mac/Sources/Services/DeviceDetector.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Services/DeviceDetector.swift
rename to apps/rebreak-magic-mac/Sources/Services/DeviceDetector.swift
diff --git a/apps/rebreak-binder-mac/Sources/Services/MDMClient.swift b/apps/rebreak-magic-mac/Sources/Services/MDMClient.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Services/MDMClient.swift
rename to apps/rebreak-magic-mac/Sources/Services/MDMClient.swift
diff --git a/apps/rebreak-binder-mac/Sources/Services/MDMStatus.swift b/apps/rebreak-magic-mac/Sources/Services/MDMStatus.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Services/MDMStatus.swift
rename to apps/rebreak-magic-mac/Sources/Services/MDMStatus.swift
diff --git a/apps/rebreak-binder-mac/Sources/Services/Paths.swift b/apps/rebreak-magic-mac/Sources/Services/Paths.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Services/Paths.swift
rename to apps/rebreak-magic-mac/Sources/Services/Paths.swift
diff --git a/apps/rebreak-binder-mac/Sources/Services/ProcessRunner.swift b/apps/rebreak-magic-mac/Sources/Services/ProcessRunner.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Services/ProcessRunner.swift
rename to apps/rebreak-magic-mac/Sources/Services/ProcessRunner.swift
diff --git a/apps/rebreak-binder-mac/Sources/Services/SuperviseRunner.swift b/apps/rebreak-magic-mac/Sources/Services/SuperviseRunner.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Services/SuperviseRunner.swift
rename to apps/rebreak-magic-mac/Sources/Services/SuperviseRunner.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/ConfigureView.swift b/apps/rebreak-magic-mac/Sources/Views/ConfigureView.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/ConfigureView.swift
rename to apps/rebreak-magic-mac/Sources/Views/ConfigureView.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/ContentView.swift b/apps/rebreak-magic-mac/Sources/Views/ContentView.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/ContentView.swift
rename to apps/rebreak-magic-mac/Sources/Views/ContentView.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/DoneView.swift b/apps/rebreak-magic-mac/Sources/Views/DoneView.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/DoneView.swift
rename to apps/rebreak-magic-mac/Sources/Views/DoneView.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/EnrollView.swift b/apps/rebreak-magic-mac/Sources/Views/EnrollView.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/EnrollView.swift
rename to apps/rebreak-magic-mac/Sources/Views/EnrollView.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/PreflightView.swift b/apps/rebreak-magic-mac/Sources/Views/PreflightView.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/PreflightView.swift
rename to apps/rebreak-magic-mac/Sources/Views/PreflightView.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/StepIndicator.swift b/apps/rebreak-magic-mac/Sources/Views/StepIndicator.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/StepIndicator.swift
rename to apps/rebreak-magic-mac/Sources/Views/StepIndicator.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/SuperviseView.swift b/apps/rebreak-magic-mac/Sources/Views/SuperviseView.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/SuperviseView.swift
rename to apps/rebreak-magic-mac/Sources/Views/SuperviseView.swift
diff --git a/apps/rebreak-binder-mac/Sources/Views/WelcomeView.swift b/apps/rebreak-magic-mac/Sources/Views/WelcomeView.swift
similarity index 100%
rename from apps/rebreak-binder-mac/Sources/Views/WelcomeView.swift
rename to apps/rebreak-magic-mac/Sources/Views/WelcomeView.swift
diff --git a/apps/rebreak-binder-mac/project.yml b/apps/rebreak-magic-mac/project.yml
similarity index 100%
rename from apps/rebreak-binder-mac/project.yml
rename to apps/rebreak-magic-mac/project.yml
diff --git a/apps/rebreak-native/.env.deploy.local.example b/apps/rebreak-native/.deploy-secrets.local.example
similarity index 100%
rename from apps/rebreak-native/.env.deploy.local.example
rename to apps/rebreak-native/.deploy-secrets.local.example
diff --git a/apps/rebreak-native/dev-ios.sh b/apps/rebreak-native/dev-ios.sh
deleted file mode 100755
index bdf8e6d..0000000
--- a/apps/rebreak-native/dev-ios.sh
+++ /dev/null
@@ -1,67 +0,0 @@
-#!/bin/bash
-# Rebreak Native: Dev-Server (Metro) + iOS Build & Run
-# Pendant zu apps/rebreak/dev-ios.sh, aber für React Native + Expo statt Capacitor.
-set -e
-
-cd "$(dirname "$0")"
-
-echo "🧠 Rebreak Native iOS Dev"
-echo "========================="
-
-# Modi:
-#   ./dev-ios.sh              → öffnet Xcode-Workspace (Default — User baut auf iPhone)
-#   ./dev-ios.sh --device     → physisches iPhone via USB (CLI-Build + Auto-Launch)
-#   ./dev-ios.sh --simulator  → iOS Simulator (schnellster Test-Loop, weniger Auth/Push-Test)
-MODE="${1:-xcode}"
-
-# Metro-Port wird NICHT mehr automatisch gekillt — falls du Metro in einem
-# anderen Terminal laufen hast, würde das hier die Session zerstören.
-# Falls Metro hängt: manuell `lsof -ti:8081 | xargs kill -9` ausführen.
-
-# Cocoapods: läuft beim ersten Run automatisch via expo run:ios.
-#    Falls "objectVersion 70 not supported" Fehler unter Xcode 26 → CocoaPods updaten:
-#       sudo gem install cocoapods --pre
-#
-#    Podfile-Fixes werden durch Config-Plugins automatisch reinpatcht:
-#    - plugins/with-fmt-consteval-fix.js → FMT_USE_CONSTEVAL=0 (Xcode 16 + RN 0.79)
-#    - plugins/with-rebreak-protection-ios.js → NEFilter Extension Target
-#    → expo prebuild --clean ist daher SAFE (Plugins regenerieren die Patches).
-#
-#    Für radikalen Cache-Reset: ./clean-ios.sh
-#    Bei Build-Errors aus dem Nichts: ./clean-ios.sh --build
-
-# 3. Run je nach Mode
-case "$MODE" in
-  --xcode|xcode|"")
-    # Falls Xcode bereits mit Rebreak.xcodeproj (statt .xcworkspace) offen ist,
-    # schließe ihn erst. Sonst kriegst du zwei Project-Windows.
-    osascript -e 'tell application "Xcode" to close every window whose name contains "Rebreak.xcodeproj"' 2>/dev/null || true
-
-    echo "🔨 Opening Xcode-Workspace..."
-    open -a Xcode ios/Rebreak.xcworkspace
-    echo ""
-    echo "✅ Xcode offen — In Xcode:"
-    echo "   1. iPhone via USB anschließen (falls nicht schon)"
-    echo "   2. Top-Bar: iPhone als Run-Target wählen (links neben Play-Button)"
-    echo "   3. Cmd+R für Build & Run auf iPhone"
-    echo ""
-    echo "ℹ️  Metro: separat starten via 'pnpm expo start --dev-client' falls noch nicht läuft"
-    ;;
-
-  --device|device)
-    echo "📱 Building für physisches iPhone (USB)..."
-    echo "ℹ️  Erste Mal: Xcode wird geöffnet zum Signing-Setup."
-    pnpm expo run:ios --device
-    ;;
-
-  --simulator|simulator)
-    echo "📱 Building für iOS Simulator..."
-    pnpm expo run:ios
-    ;;
-
-  *)
-    echo "Unknown mode: $MODE"
-    echo "Usage: ./dev-ios.sh [--xcode|--device|--simulator]"
-    exit 1
-    ;;
-esac
diff --git a/apps/rebreak-native/dev-iphone.sh b/apps/rebreak-native/dev-iphone.sh
deleted file mode 100755
index ba47681..0000000
--- a/apps/rebreak-native/dev-iphone.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/bash
-# Rebreak Native — Dev auf physischem iPhone (kein Simulator).
-#
-# Was es macht:
-#   - Killt alte Metro-Instanzen auf 8081 (saubere Session)
-#   - Startet Metro mit --host lan damit iPhone via WiFi connecten kann
-#   - Druckt deine LAN-IP zum manuellen Eintragen falls Bonjour failt
-#
-# Auf iPhone:
-#   1. Mac + iPhone müssen im SELBEN WiFi sein
-#   2. App komplett killen (App-Switcher → swipe up)
-#   3. App neu öffnen — dev-client sollte Metro automatisch finden
-#   4. Falls nicht: dev-launcher → "Enter URL manually" → http://<LAN-IP>:8081
-#
-# WICHTIG: Im Metro-Terminal NICHT `i` drücken — sonst startet Simulator!
-#          Nur `r` für Reload.
-set -e
-cd "$(dirname "$0")"
-
-# FamilyControls-Flag: default ON für lokale Dev-Builds, override via
-#   REBREAK_ENABLE_FAMILY_CONTROLS=0 ./dev-iphone.sh
-# wenn man bewusst ohne FC testen will (z.B. TestFlight-Parity-Check).
-# app.config.ts liest die Var um Constants.expoConfig.extra.familyControlsEnabled
-# zu setzen → lib/protection.ts.FAMILY_CONTROLS_AVAILABLE → Blocker-UI.
-export REBREAK_ENABLE_FAMILY_CONTROLS="${REBREAK_ENABLE_FAMILY_CONTROLS:-1}"
-
-echo "🧹 Killing old Metro on port 8081..."
-lsof -ti:8081 | xargs kill -9 2>/dev/null || true
-
-echo ""
-echo "📡 Mac LAN-IP für iPhone:"
-ipconfig getifaddr en0 2>/dev/null || ipconfig getifaddr en1 2>/dev/null || echo "   (kein WiFi/Ethernet detected)"
-echo ""
-echo "ℹ️  Falls dev-client Metro nicht automatisch findet:"
-echo "   im iPhone-Launcher → 'Enter URL manually' → http://<LAN-IP>:8081"
-echo ""
-echo "🚀 Starting Metro with --host lan..."
-echo "   (Drücke 'r' für Reload, NICHT 'i' — sonst startet Simulator!)"
-echo ""
-
-exec pnpm expo start --host lan --clear --dev-client
diff --git a/apps/rebreak-native/metro.sh b/apps/rebreak-native/metro.sh
deleted file mode 100755
index 29fb8cc..0000000
--- a/apps/rebreak-native/metro.sh
+++ /dev/null
@@ -1,34 +0,0 @@
-#!/bin/bash
-# Rebreak Native: Metro Bundler (Kill + Clean Restart).
-# Killt jede laufende Instanz auf 8081, dann frischer Start mit --clear-Cache.
-# Aufruf: ./metro.sh         (mit cache-clear, Default)
-#         ./metro.sh --keep   (ohne --clear, schneller wenn keine Dependency-Changes)
-set -e
-
-cd "$(dirname "$0")"
-
-echo "🚇 Metro Bundler"
-echo "================"
-
-# 1) Existierende Metro-Instanz auf Port 8081 killen
-PIDS=$(lsof -iTCP:8081 -sTCP:LISTEN -n -P 2>/dev/null | awk 'NR>1 {print $2}' | sort -u)
-if [ -n "$PIDS" ]; then
-  echo "→ Killing existing Metro on :8081 (PIDs: $PIDS)"
-  echo "$PIDS" | xargs kill -9 2>/dev/null || true
-  sleep 1
-else
-  echo "→ Kein Metro auf :8081 aktiv"
-fi
-
-# 2) Stale node-Prozesse die expo CLI gestartet haben (Belt-and-Suspenders)
-pkill -f "expo start" 2>/dev/null || true
-pkill -f "react-native/cli/build" 2>/dev/null || true
-
-# 3) Start
-if [ "$1" = "--keep" ]; then
-  echo "→ Starte Metro (Cache behalten)"
-  exec npx expo start
-else
-  echo "→ Starte Metro mit --clear (Haste-Map + Transformer-Cache reset)"
-  exec npx expo start --clear
-fi
diff --git a/backend/server/api/coach/message.post.ts b/backend/server/api/coach/message.post.ts
index df6f2d9..2de84b8 100644
--- a/backend/server/api/coach/message.post.ts
+++ b/backend/server/api/coach/message.post.ts
@@ -305,6 +305,7 @@ import { usePrisma } from "../../utils/prisma";
 import { getMemoriesForUser, markReferenced } from "../../db/lyraMemory";
 import { extractAndStoreMemories } from "../../utils/lyraMemoryExtract";
 import { stripMarkdown } from "../../utils/strip-markdown";
+import { detectLang } from "../../utils/detect-lang";
 
 /**
  * Lyra-Plan-Beschreibung dynamisch aus PLAN_LIMITS generieren.
@@ -476,17 +477,27 @@ export default defineEventHandler(async (event) => {
     generatePlanDetails(),
   );
 
-  // Sprach-Instruktion
-  const LANG_INSTRUCTIONS: Record<string, string> = {
-    de: "Antworte IMMER auf Deutsch, egal in welcher Sprache der User schreibt.",
-    en: "Always respond in English, regardless of what language the user writes in.",
-    tr: "Her zaman Türkçe yanıt ver, kullanıcı hangi dilde yazarsa yazsın.",
-    ar: "رد دائماً باللغة العربية، بغض النظر عن اللغة التي يكتب بها المستخدم.",
-    fr: "Réponds toujours en français, quelle que soit la langue dans laquelle l'utilisateur écrit.",
+  // Sprach-Instruktion: dynamisch nach (a) Sprache der letzten User-Message
+  // und (b) App-Sprach-Einstellung als Fallback. Vorher war's hartcodiert
+  // "antworte IMMER auf X" — wenn User mitten im Chat die Sprache wechselte,
+  // antwortete Lyra weiter in der App-Sprache. Jetzt: match user.
+  const LANG_NAMES: Record<string, string> = {
+    de: "German", en: "English", tr: "Turkish", ar: "Arabic",
+    fr: "French", es: "Spanish", it: "Italian", pt: "Portuguese",
+    ru: "Russian", ja: "Japanese", ko: "Korean", zh: "Chinese",
+    he: "Hebrew", th: "Thai",
   };
-  const langInstruction =
-    LANG_INSTRUCTIONS[locale ?? "de"] ?? LANG_INSTRUCTIONS.de;
-  systemPrompt = `${langInstruction}\n\n${systemPrompt}`;
+  const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+  const detectedFromUser = detectLang(lastUserMsg?.content ?? "", locale);
+  const appLangCode = locale ? locale.split("-")[0].toLowerCase() : null;
+  const appLangName =
+    (appLangCode && LANG_NAMES[appLangCode]) || "the user's language";
+  const detectedName =
+    (detectedFromUser && LANG_NAMES[detectedFromUser]) || null;
+  const langInstruction = detectedName
+    ? `LANGUAGE: Reply in ${detectedName} — match the language the user just wrote in. If they switch languages, switch with them. App default fallback: ${appLangName}.`
+    : `LANGUAGE: Reply in ${appLangName} (the user's app language). If the user clearly writes in another language, match theirs.`;
+  systemPrompt = `${langInstruction}\n\n${systemPrompt}\n\n${langInstruction}`;
 
   // Plan-Kontext injizieren
   const PLAN_LABELS: Record<string, string> = {
diff --git a/backend/server/api/coach/sos-stream.get.ts b/backend/server/api/coach/sos-stream.get.ts
index 2c0c16c..84543c4 100644
--- a/backend/server/api/coach/sos-stream.get.ts
+++ b/backend/server/api/coach/sos-stream.get.ts
@@ -23,6 +23,7 @@ import { COACH_SYSTEM_PROMPT } from "./message.post";
 import { getMemoriesForUser, markReferenced } from "../../db/lyraMemory";
 import { extractAndStoreMemories } from "../../utils/lyraMemoryExtract";
 import { getProfile } from "../../db/profile";
+import { detectLang } from "../../utils/detect-lang";
 
 const SOS_INSTRUCTION = `\n\nDU BEFINDEST DICH IN EINEM AKUTEN SOS-MOMENT. WICHTIGE REGELN:
 - Antworte als REINER TEXT, KEINE JSON-Wrapper, KEIN Markdown, KEINE Aufzählungen.
@@ -89,15 +90,25 @@ export default defineEventHandler(async (event) => {
 
   const config = useRuntimeConfig();
 
-  // System-Prompt: Coach-Basis + SOS-Streaming-Regeln
-  const LANG: Record<string, string> = {
-    de: "Antworte IMMER auf Deutsch.",
-    en: "Always respond in English.",
-    tr: "Her zaman Türkçe yanıt ver.",
-    ar: "رد دائماً باللغة العربية.",
-    fr: "Réponds toujours en français.",
+  // Sprach-Instruktion: dynamisch nach User-Message-Sprache + App-Locale-
+  // Fallback. Vorher hardcoded "antworte immer auf X" — ignorierte
+  // Sprach-Wechsel mitten in der Session.
+  const LANG_NAMES: Record<string, string> = {
+    de: "German", en: "English", tr: "Turkish", ar: "Arabic",
+    fr: "French", es: "Spanish", it: "Italian", pt: "Portuguese",
+    ru: "Russian", ja: "Japanese", ko: "Korean", zh: "Chinese",
+    he: "Hebrew", th: "Thai",
   };
-  const lang = LANG[locale ?? "de"] ?? LANG.de;
+  const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+  const detectedFromUser = detectLang(lastUserMsg?.content ?? "", locale);
+  const appLangCode = locale ? locale.split("-")[0].toLowerCase() : null;
+  const appLangName =
+    (appLangCode && LANG_NAMES[appLangCode]) || "the user's language";
+  const detectedName =
+    (detectedFromUser && LANG_NAMES[detectedFromUser]) || null;
+  const lang = detectedName
+    ? `LANGUAGE: Reply in ${detectedName} — match the language the user just wrote in. If they switch languages, switch with them. App default fallback: ${appLangName}.`
+    : `LANGUAGE: Reply in ${appLangName} (the user's app language). If the user clearly writes in another language, match theirs.`;
 
   // Memory-Injection: Lyra-Erinnerungen aus früheren Sessions laden
   let memoryBlock = "";
@@ -189,7 +200,7 @@ export default defineEventHandler(async (event) => {
     console.error("[sos-stream] profile load (non-fatal):", e);
   }
 
-  const systemPrompt = `${nicknamePrefix}${demographicsBlock}${memoryBlock}${lang}\n\n${COACH_SYSTEM_PROMPT.replace("{{PLAN_DETAILS}}", "")}${SOS_INSTRUCTION}`;
+  const systemPrompt = `${nicknamePrefix}${demographicsBlock}${memoryBlock}${lang}\n\n${COACH_SYSTEM_PROMPT.replace("{{PLAN_DETAILS}}", "")}${SOS_INSTRUCTION}\n\n${lang}`;
 
   // Erste Nachricht muss user sein
   const firstUserIdx = messages.findIndex((m) => m.role === "user");
diff --git a/backend/server/api/coach/speak-cartesia.post.ts b/backend/server/api/coach/speak-cartesia.post.ts
index 442d941..359a75a 100644
--- a/backend/server/api/coach/speak-cartesia.post.ts
+++ b/backend/server/api/coach/speak-cartesia.post.ts
@@ -1,22 +1,28 @@
 /**
  * POST /api/coach/speak-cartesia
- * Cartesia Sonic-2 — schnellstes TTS (~75ms first-byte), native German.
+ * Cartesia Sonic-3 — schnellstes TTS (~75ms first-byte), 42 Sprachen multilingual.
  *
  * Returns audio/mpeg. Voice via runtimeConfig.cartesiaVoiceId
  * (Fallback `b9de4a89-2257-424b-94c2-db18ba68c81a` wenn unset).
  */
+import { detectLang } from "../../utils/detect-lang";
+
 const FALLBACK_VOICE_ID = "b9de4a89-2257-424b-94c2-db18ba68c81a";
 
 export default defineEventHandler(async (event) => {
   await requireUser(event);
 
   const body = await readBody(event);
-  const { text } = body as { text: string };
+  const { text, locale } = body as { text: string; locale?: string };
 
   if (!text?.trim()) {
     throw createError({ statusCode: 400, message: "text fehlt" });
   }
 
+  // Sprache dynamisch: Text-Script-Detection > App-Locale-Hint > null (Provider
+  // auto-detect). Kein "de"-Default mehr, sonst klingt arabischer Text deutsch.
+  const lang = detectLang(text, locale);
+
   const config = useRuntimeConfig();
   const key =
     (config.cartesiaApiKey as string) || process.env.CARTESIA_API_KEY || "";
@@ -40,7 +46,8 @@ export default defineEventHandler(async (event) => {
       "Content-Type": "application/json",
     },
     body: JSON.stringify({
-      model_id: "sonic-2",
+      // sonic-3 unterstützt 42 Sprachen inkl. ar/tr (sonic-2 = nur de/en).
+      model_id: "sonic-3",
       transcript: text.slice(0, 4096),
       voice: { mode: "id", id: voiceId },
       output_format: {
@@ -48,7 +55,9 @@ export default defineEventHandler(async (event) => {
         sample_rate: 22050,
         bit_rate: 64000,
       },
-      language: "de",
+      // language nur setzen wenn aus Detection oder Locale ableitbar —
+      // sonst Sonic-3 auto-detecten lassen.
+      ...(lang ? { language: lang } : {}),
     }),
   });
 
diff --git a/backend/server/api/coach/speak-elevenlabs.post.ts b/backend/server/api/coach/speak-elevenlabs.post.ts
index 1cf45a6..18d0371 100644
--- a/backend/server/api/coach/speak-elevenlabs.post.ts
+++ b/backend/server/api/coach/speak-elevenlabs.post.ts
@@ -6,18 +6,24 @@
  * Returns audio/mpeg. Voice ist deterministisch konstant über mehrere Calls
  * — identisch zu Gemini-Verhalten, kein Mode-Switch wie bei gpt-4o-mini-tts.
  */
+import { detectLang } from "../../utils/detect-lang";
+
 const FALLBACK_VOICE_ID = "kdmDKE6EkgrWrrykO9Qt"; // Alexandra
 
 export default defineEventHandler(async (event) => {
   await requireUser(event);
 
   const body = await readBody(event);
-  const { text } = body as { text: string };
+  const { text, locale } = body as { text: string; locale?: string };
 
   if (!text?.trim()) {
     throw createError({ statusCode: 400, message: "text fehlt" });
   }
 
+  // Sprache dynamisch ableiten (Text-Script > Locale-Hint > null) statt
+  // hardcoded "de" — sonst landen arabische Texte in deutscher Phonetik.
+  const lang = detectLang(text, locale);
+
   const config = useRuntimeConfig();
   // Fallback chain: runtimeConfig (Nuxt build-time) → process.env (runtime injection
   // via Infisical at pm2-start). Stellt sicher dass auch dann ein Key vorhanden ist
@@ -66,6 +72,9 @@ export default defineEventHandler(async (event) => {
         // Turbo v2.5: ~50% schneller als multilingual_v2, marginal niedrigere
         // Quality — Trade-off lohnt sich für SOS (latency > Studio-Polish).
         model_id: "eleven_turbo_v2_5",
+        // language_code nur explizit wenn wir ihn aus Detection/Locale
+        // ableiten konnten — sonst ElevenLabs auto-detecten lassen.
+        ...(lang ? { language_code: lang } : {}),
         voice_settings: {
           stability: 0.5,
           similarity_boost: 0.75,
diff --git a/backend/server/api/coach/speak.post.ts b/backend/server/api/coach/speak.post.ts
index d2b3430..575d377 100644
--- a/backend/server/api/coach/speak.post.ts
+++ b/backend/server/api/coach/speak.post.ts
@@ -1,6 +1,7 @@
 import type { H3Event } from "h3";
 import type { VoiceConfig } from "../../utils/plan-features";
 import { getPlanLimits } from "../../utils/plan-features";
+import { detectLang } from "../../utils/detect-lang";
 import {
   getRemainingVoiceQuota,
   consumeVoiceQuota,
@@ -42,9 +43,10 @@ export default defineEventHandler(async (event) => {
   }
 
   const trimmed = text.slice(0, 4096);
-  // i18n-Locale (z.B. "ar", "de-DE") → 2-Buchstaben-Basis-Sprachcode für die
-  // Provider. Ohne das sprach Lyra arabischen Text mit deutscher Stimme/Phonetik.
-  const lang = (locale ?? "de").split("-")[0].toLowerCase();
+  // Sprache dynamisch: erst Text-Script-Detection (Arabic/Cyrillic/CJK/Turkish
+  // letters …), Fallback auf App-Locale aus body. Kein "de"-Default mehr —
+  // wenn beides leer ist, lassen wir den Provider auto-detecten.
+  const lang = detectLang(trimmed, locale);
 
   // ─── Load profile + plan ────────────────────────────────────────────────
   const db = usePrisma();
@@ -102,7 +104,7 @@ async function speakGoogle(
   voiceCfg: VoiceConfig,
   userId: string,
   plan: string,
-  lang: string,
+  lang: string | null,
 ) {
   const key = (config.googleApiKey as string) || process.env.GOOGLE_API_KEY || "";
   if (!key) {
@@ -117,7 +119,9 @@ async function speakGoogle(
     de: "de-DE", en: "en-US", fr: "fr-FR", ar: "ar-XA",
     tr: "tr-TR", es: "es-ES", pt: "pt-PT", it: "it-IT",
   };
-  const languageCode = GOOGLE_LANG[lang] ?? "de-DE";
+  // Google verlangt zwingend languageCode — wenn weder Detection noch Locale
+  // greifen, neutraler en-US-Fallback statt de-DE-Bias.
+  const languageCode = (lang && GOOGLE_LANG[lang]) || "en-US";
   const voiceName = lang === "de" ? (voiceCfg.model ?? "de-DE-Neural2-F") : undefined;
 
   const response = await fetch(
@@ -171,7 +175,7 @@ async function speakCartesia(
   voiceCfg: VoiceConfig,
   userId: string,
   plan: string,
-  lang: string,
+  lang: string | null,
 ) {
   const key = (config.cartesiaApiKey as string) || process.env.CARTESIA_API_KEY || "";
   if (!key) {
@@ -201,9 +205,9 @@ async function speakCartesia(
         sample_rate: 22050,
         bit_rate: 64000,
       },
-      // Sonic-3 unterstützt 42 Sprachen inkl. ar — language aus User-Locale
-      // statt hardcoded "de", sonst klingt arabischer Text deutsch-phonetisch.
-      language: lang,
+      // Sonic-3 unterstützt 42 Sprachen — wenn Detection greift, language
+      // explizit setzen, sonst Provider auto-detecten lassen.
+      ...(lang ? { language: lang } : {}),
     }),
   });
 
@@ -231,7 +235,7 @@ async function speakElevenLabs(
   userId: string,
   plan: string,
   userLyraVoiceId: string | null = null,
-  lang: string = "de",
+  lang: string | null = null,
 ) {
   const key =
     (config.elevenlabsApiKey as string) || process.env.ELEVENLABS_API_KEY || "";
@@ -263,9 +267,10 @@ async function speakElevenLabs(
         text,
         model_id: modelId,
         // Turbo v2.5 ist multilingual (32 Sprachen inkl. ar) — dieselbe Stimme
-        // spricht die Zielsprache. language_code explizit setzen statt nur
-        // Auto-Detect, damit kurze Texte zuverlässig in der User-Sprache landen.
-        language_code: lang,
+        // spricht die Zielsprache. language_code nur explizit setzen wenn wir
+        // ihn aus Detection/Locale ableiten konnten; sonst ElevenLabs
+        // auto-detecten lassen statt einen falschen Code aufzuzwingen.
+        ...(lang ? { language_code: lang } : {}),
         voice_settings: {
           stability: 0.5,
           similarity_boost: 0.75,
diff --git a/backend/server/utils/detect-lang.ts b/backend/server/utils/detect-lang.ts
new file mode 100644
index 0000000..6f68d1a
--- /dev/null
+++ b/backend/server/utils/detect-lang.ts
@@ -0,0 +1,36 @@
+/**
+ * Detect language from text using Unicode script ranges.
+ *
+ * Non-Latin scripts are detected reliably from a single character. For Latin
+ * scripts (de/en/fr/tr/es/it/pt …) we fall back to the supplied locale-hint,
+ * since distinguishing them needs a real NLP library and the user-facing
+ * App-Sprache is a perfectly good signal.
+ *
+ * Returns a 2-letter ISO code, or null if neither detection nor hint apply.
+ */
+export function detectLang(
+  text: string,
+  localeHint?: string | null,
+): string | null {
+  if (text) {
+    // Sample a window — first 300 chars is plenty; counting script hits is
+    // cheaper than scanning multi-KB Lyra-Antworten.
+    const sample = text.slice(0, 300);
+    if (/[\u0600-\u06FF\u0750-\u077F\u08A0-\u08FF]/.test(sample)) return "ar"; // Arabic
+    if (/[\u0400-\u04FF]/.test(sample)) return "ru"; // Cyrillic
+    if (/[\u3040-\u309F\u30A0-\u30FF]/.test(sample)) return "ja"; // Hiragana/Katakana
+    if (/[\uAC00-\uD7AF]/.test(sample)) return "ko"; // Hangul
+    if (/[\u4E00-\u9FFF]/.test(sample)) return "zh"; // CJK Unified Ideographs
+    if (/[\u0590-\u05FF]/.test(sample)) return "he"; // Hebrew
+    if (/[\u0E00-\u0E7F]/.test(sample)) return "th"; // Thai
+    // Turkish-specific Latin letters — strong hint without an NLP lib.
+    if (/[ğĞıİşŞ]/.test(sample)) return "tr";
+  }
+
+  if (localeHint) {
+    const base = localeHint.split("-")[0].toLowerCase();
+    if (base) return base;
+  }
+
+  return null;
+}