diff --git a/setup.sh b/setup.sh
index 633a9c0..8ddf160 100644
--- a/setup.sh
+++ b/setup.sh
@@ -197,22 +197,25 @@ logging.basicConfig()
 app = Flask(__name__)
 
 # Load Languages
+import os
 import json
 
+TRANSLATION_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'translations'))
+SUPPORTED_LANGUAGES = ['de', 'en']
 TRANSLATIONS = {}
-SUPPORTED_LANGUAGES = os.getenv('SUPPORTED_LANGUAGES', 'en').split(',')
 
 for lang in SUPPORTED_LANGUAGES:
     try:
-        with open(f'translations/{lang}.json', encoding='utf-8') as f:
+        with open(os.path.join(TRANSLATION_DIR, f'{lang}.json'), encoding='utf-8') as f:
             TRANSLATIONS[lang] = json.load(f)
     except Exception:
         TRANSLATIONS[lang] = {}
 
 def translate(key, lang=None, **kwargs):
     if not lang:
-        lang = session.get('lang', os.getenv('DEFAULT_LANGUAGE', 'en'))
-    return TRANSLATIONS.get(lang, {}).get(key, key).format(**kwargs)
+        lang = session.get('lang', 'en')
+    value = TRANSLATIONS.get(lang, {}).get(key, key)
+    return value.format(**kwargs) if kwargs else value
 
 csrf = CSRFProtect(app)
 
@@ -269,13 +272,9 @@ def enforce_https():
 @app.context_processor
 def inject_template_vars():
     def _(key, **kwargs):
-        lang = session.get('lang', os.getenv('DEFAULT_LANGUAGE', 'en'))
+        lang = session.get('lang', 'en')
         return translate(key, lang, **kwargs)
-    return dict(
-        _=_,
-        get_locale=lambda: session.get('lang', os.getenv('DEFAULT_LANGUAGE', 'en')),
-        theme='dark' if request.cookies.get('dark_mode') == 'true' else 'light'
-    )
+    return dict(_=_)
 
 # DB Models
 class User(db.Model, UserMixin):
@@ -865,7 +864,7 @@ services:
       - TZ=${TZ}
     volumes:
       - ../data:/app/data
-      - ../translations:/app/translations
+      - ../translations:/app/translations:rw
       - ../.env:/app/.env
     user: "${UID}:${GID}"
     restart: unless-stopped
@@ -881,19 +880,13 @@ find ../data ../translations -type f -exec chmod 664 {} \;
 # 8. Translation and upgrade scripts
 cat <<JSON_END > "$TRANSLATIONS_DIR/de.json"
 {
-  "Game List": "Spieleliste",
-  "Add New Game": "Neues Spiel hinzufügen",
-  "Search": "Suche",
-  "Welcome %(username)s!": "Willkommen %(username)s!"
+
 }
 JSON_END
 
 cat <<JSON_END > "$TRANSLATIONS_DIR/en.json"
 {
-  "Game List": "Game List",
-  "Add New Game": "Add New Game",
-  "Search": "Search",
-  "Welcome %(username)s!": "Welcome %(username)s!"
+
 }
 JSON_END
 
@@ -902,11 +895,16 @@ cat <<'SCRIPT_END' > ../translate.sh
 #!/bin/bash
 set -e
 
-# Directories and languages
 TRANSLATION_DIR="./translations"
 LANGS=("de" "en")
 
-# 1. Create JSON files if they do not yet exist
+# Prüfe jq
+if ! command -v jq &>/dev/null; then
+  echo "❌ jq is required. Install with: sudo apt-get install jq"
+  exit 1
+fi
+
+# 1. Lege JSON-Dateien an, falls sie fehlen
 for lang in "${LANGS[@]}"; do
   file="$TRANSLATION_DIR/$lang.json"
   if [ ! -f "$file" ]; then
@@ -915,26 +913,27 @@ for lang in "${LANGS[@]}"; do
   fi
 done
 
-# 2. Extract all strings to be translated from the templates and Python files
-STRINGS=$(grep -hoR "_('\([^']*\)')" ./templates ./app.py | sed "s/.*_('\([^']*\)').*/\1/" | sort | uniq)
+# 2. Extrahiere alle zu übersetzenden Strings
+STRINGS=$(grep -rhoP "_\(\s*['\"](.+?)['\"]\s*\)" steam-gift-manager/templates steam-gift-manager/app.py | \
+          sed -E "s/_\(\s*['\"](.+?)['\"]\s*\)/\1/" | sort | uniq)
 
-# 3. Insert new keys into the JSON files without overwriting existing translations
+# 3. Ergänze neue Keys in die JSON-Dateien
 for lang in "${LANGS[@]}"; do
   file="$TRANSLATION_DIR/$lang.json"
   tmp="$file.tmp"
   cp "$file" "$tmp"
-  for key in $STRINGS; do
-    # Prüfe, ob der Key schon existiert
+  while IFS= read -r key; do
     if ! jq -e --arg k "$key" 'has($k)' "$tmp" >/dev/null; then
       jq --arg k "$key" '. + {($k): ""}' "$tmp" > "$tmp.new" && mv "$tmp.new" "$tmp"
     fi
-  done
+  done <<< "$STRINGS"
   mv "$tmp" "$file"
   echo "Updated $file"
 done
 
 echo "✅ JSON translation files updated. Please enter your translations!"
 
+
 SCRIPT_END
 chmod +x ../translate.sh
 
@@ -1046,7 +1045,7 @@ mkdir -p templates static
 # Base Template
 cat <<HTML_END > templates/base.html
 <!DOCTYPE html>
-<html lang="{{ get_locale() if get_locale() in ['en', 'de'] else 'en' }}" data-bs-theme="{{ theme }}">
+<html lang="{{ session.get('lang', 'en') }}" data-bs-theme="{{ theme }}">
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
@@ -1096,13 +1095,13 @@ cat <<HTML_END > templates/base.html
                     <label class="form-check-label" for="darkModeSwitch">{{ _('Dark Mode') }}</label>
                 </div>
                 <div class="dropdown ms-3">
-                    <div hidden id="locale-debug" data-locale="{{ get_locale() }}"></div>
+                    <div hidden id="locale-debug" data-locale="{{ session.get('lang', 'en') }}"></div>
                     <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">
-                        {% if get_locale() == 'de' %} Deutsch {% elif get_locale() == 'en' %} English {% else %} Sprache {% endif %}
+                        {% if session.get('lang', 'en') == 'de' %} Deutsch {% elif session.get('lang', 'en') == 'en' %} English {% else %} Sprache {% endif %}
                     </button>
                     <ul class="dropdown-menu">
-                        <li><a class="dropdown-item {% if get_locale() == 'de' %}active{% endif %}" href="{{ url_for('set_lang', lang='de') }}">Deutsch</a></li>
-                        <li><a class="dropdown-item {% if get_locale() == 'en' %}active{% endif %}" href="{{ url_for('set_lang', lang='en') }}">English</a></li>
+                        <li><a class="dropdown-item {% if session.get('lang', 'en') == 'de' %}active{% endif %}" href="{{ url_for('set_lang', lang='de') }}">Deutsch</a></li>
+                        <li><a class="dropdown-item {% if session.get('lang', 'en') == 'en' %}active{% endif %}" href="{{ url_for('set_lang', lang='en') }}">English</a></li>
                     </ul>
                 </div>
                 {% if current_user.is_authenticated %}