diff --git a/app/appearance/langs/es_ES.json b/app/appearance/langs/es_ES.json
index d4db5326e..d6f768232 100644
--- a/app/appearance/langs/es_ES.json
+++ b/app/appearance/langs/es_ES.json
@@ -153,7 +153,7 @@
   "dndFolderTip": "Tenga en cuenta que ${x} solo inserta el hipervínculo file:// y no copia el archivo",
   "removeCol": "¿Está seguro de que desea eliminar la columna <b>${x}</b> en la base de datos?",
   "removeColConfirm": "⚠️ Eliminar columna",
-  "vídeo": "Vídeo",
+  "video": "Vídeo",
   "audio": "Audio",
   "updateAll": "Actualizar todo",
   "confirmUpdateAll": "¿Estás seguro de que deseas actualizar todo?",
@@ -376,8 +376,8 @@
   "showAll": "Mostrar todo",
   "showCol": "Mostrar columna",
   "number": "Número",
-  "fecha": "Fecha",
-  "seleccionar": "Seleccionar",
+  "date": "Fecha",
+  "select": "Seleccionar",
   "multiSelect": "Selección múltiple",
   "commandEmpty": "Aún no hay ningún comando, haga clic para ir al mercado e instalar complementos",
   "commandPanel": "Paleta de comandos",
@@ -534,7 +534,7 @@
   "addDeck": "Añadir al mazo",
   "removeDeck": "Eliminar del mazo",
   "riffCard": "Tarjeta Flash",
-  "comparar": "Comparar",
+  "compare": "Comparar",
   "switchTab": "Conmutador",
   "recentDocs": "Documentos recientes",
   "autoLaunch": "Inicio automático al arrancar",
@@ -545,7 +545,7 @@
   "saveCriterion": "Guardar criterios de consulta",
   "useCriterion": "Las condiciones de consulta actuales ya no se utilizarán para la siguiente consulta",
   "removeCriterion": "Eliminar criterios de consulta",
-  "grupo": "Grupo",
+  "group": "Grupo",
   "noGroupBy": "Sin agrupar",
   "groupByDoc": "Agrupar por documento",
   "leftRightLayout": "Disposición izquierda y derecha",
@@ -586,7 +586,7 @@
   "goForward": "Ir hacia adelante",
   "goBack": "Ir hacia atrás",
   "docNameAndContent": "Nombre y contenido del documento",
-  "miga de pan": "Miga de pan",
+  "breadcrumb": "Miga de pan",
   "embedBlockBreadcrumb": "Incrustar migas de pan de bloque",
   "embedBlockBreadcrumbTip": "Después de habilitar los bloques incrustados, se mostrarán migas de pan",
   "appearanceMode": "Modo de apariencia",
@@ -1328,7 +1328,7 @@
   "italic": "Cursiva",
   "line": "Divisor",
   "link": "Enlace",
-  "imagen": "Imagen",
+  "image": "Imagen",
   "ref": "Ref",
   "list": "Lista",
   "more": "Más",
diff --git a/app/appearance/langs/fr_FR.json b/app/appearance/langs/fr_FR.json
index 683a0a429..6b335913b 100644
--- a/app/appearance/langs/fr_FR.json
+++ b/app/appearance/langs/fr_FR.json
@@ -322,7 +322,7 @@
   "calcResultCountAll": "Compter tout",
   "calcResultCountValues": "Compter les valeurs",
   "calcResultCountUniqueValues": "Compter les valeurs uniques",
-  "calcResultCountVide": "Compter vide",
+  "calcResultCountEmpty": "Compter vide",
   "calcResultCountNotEmpty": "Compter non vide",
   "calcResultPercentEmpty": "Pourcentage vide",
   "calcResultPercentNotEmpty": "Pourcentage non vide",
@@ -534,7 +534,7 @@
   "addDeck": "Ajouter au deck",
   "removeDeck": "Retirer du deck",
   "riffCard": "Carte flash",
-  "comparer": "Comparer",
+  "compare": "Comparer",
   "switchTab": "Commutateur",
   "recentDocs": "Documents récents",
   "autoLaunch": "Lancement automatique au démarrage",
@@ -545,7 +545,7 @@
   "saveCriterion": "Enregistrer les critères de requête",
   "useCriterion": "Les conditions de requête actuelles ne seront plus utilisées pour la prochaine requête",
   "removeCriterion": "Supprimer les critères de requête",
-  "groupe": "Groupe",
+  "group": "Groupe",
   "noGroupBy": "Aucun regroupement",
   "groupByDoc": "Regrouper par document",
   "leftRightLayout": "Disposition gauche et droite",
@@ -586,7 +586,7 @@
   "goForward": "Suivant",
   "goBack": "Retour",
   "docNameAndContent": "Nom et contenu du document",
-  "fil d'Ariane": "Fil d'Ariane",
+  "breadcrumb": "Fil d'Ariane",
   "embedBlockBreadcrumb": "Intégrer le fil d'Ariane du bloc",
   "embedBlockBreadcrumbTip": "Après avoir activé l'intégration, les blocs afficheront le fil d'Ariane",
   "appearanceMode": "Mode d'apparence",
diff --git a/app/appearance/langs/zh_CHT.json b/app/appearance/langs/zh_CHT.json
index 811294cdb..1969905b4 100644
--- a/app/appearance/langs/zh_CHT.json
+++ b/app/appearance/langs/zh_CHT.json
@@ -1079,7 +1079,7 @@
   "sync": "同步",
   "syncNow": "立即同步",
   "waitSync": "編輯資料尚未同步到雲端",
-  "payment": "累計已支付",
+  "paymentSum": "累計已支付",
   "refresh": "重新整理",
   "logout": "登出",
   "refreshUser": "使用者資訊更新完畢",
diff --git a/scripts/check-lang-keys.py b/scripts/check-lang-keys.py
new file mode 100644
index 000000000..6f4eefb7a
--- /dev/null
+++ b/scripts/check-lang-keys.py
@@ -0,0 +1,377 @@
+"""
+Check if language file keys are complete.
+
+This script checks all language files in app/appearance/langs/ directory
+and finds:
+- Missing keys: keys that exist in most files but not in current file
+- Extra keys: keys that don't exist in most files but exist in current file
+- Duplicate keys: keys that appear multiple times in the same file
+using statistical methods.
+
+Usage:
+    python scripts/check-lang-keys.py
+    python scripts/check-lang-keys.py -d app/appearance/langs
+    python scripts/check-lang-keys.py --dir app/appearance/langs
+
+Options:
+    -d, --dir DIR    Language files directory path (default: app/appearance/langs)
+    -h, --help       Show help message and exit
+
+Exit codes:
+    0    All language files have complete keys
+    1    Some language files have missing or extra keys
+"""
+
+import json
+import os
+import re
+from pathlib import Path
+from argparse import ArgumentParser
+from collections import defaultdict, Counter
+
+
+def find_duplicate_keys_recursive(data, prefix="", duplicates=None):
+    """Recursively find duplicate keys in nested JSON structure.
+
+    Args:
+        data: JSON data (dict, list, or primitive)
+        prefix: Current key prefix (for nested keys)
+        duplicates: Set to store duplicate keys found
+
+    Returns:
+        set: Set of duplicate keys (using dot notation for nested keys)
+    """
+    if duplicates is None:
+        duplicates = set()
+    
+    if isinstance(data, dict):
+        seen_keys = {}
+        for key, value in data.items():
+            full_key = f"{prefix}.{key}" if prefix else key
+            
+            # Check for duplicate at current level
+            if key in seen_keys:
+                duplicates.add(full_key)
+            seen_keys[key] = True
+            
+            # Recursively check nested structures
+            if isinstance(value, dict):
+                find_duplicate_keys_recursive(value, full_key, duplicates)
+            elif isinstance(value, list):
+                for i, item in enumerate(value):
+                    if isinstance(item, dict):
+                        find_duplicate_keys_recursive(item, f"{full_key}[{i}]", duplicates)
+    
+    return duplicates
+
+
+def find_duplicate_keys(file_path):
+    """Find duplicate keys in JSON file including nested structures.
+
+    Args:
+        file_path (Path): Language file path
+
+    Returns:
+        list: List of duplicate keys found in the file (using dot notation for nested keys)
+    """
+    try:
+        with open(file_path, 'r', encoding='utf-8') as f:
+            data = json.load(f)
+        
+        if not isinstance(data, dict):
+            return []
+        
+        duplicates = find_duplicate_keys_recursive(data)
+        return sorted(duplicates)
+    except Exception as e:
+        print(f"Error: Failed to check duplicate keys in {file_path}: {e}")
+        return []
+
+
+def collect_all_keys(data, prefix=""):
+    """Recursively collect all keys from nested JSON structure.
+
+    Args:
+        data: JSON data (dict, list, or primitive)
+        prefix: Current key prefix (for nested keys)
+
+    Returns:
+        set: Set of all keys (using dot notation for nested keys)
+    """
+    keys = set()
+    
+    if isinstance(data, dict):
+        for key, value in data.items():
+            full_key = f"{prefix}.{key}" if prefix else key
+            keys.add(full_key)
+            
+            # Recursively collect nested keys
+            if isinstance(value, dict):
+                keys.update(collect_all_keys(value, full_key))
+            elif isinstance(value, list):
+                # Handle list of objects
+                for i, item in enumerate(value):
+                    if isinstance(item, dict):
+                        keys.update(collect_all_keys(item, f"{full_key}[{i}]"))
+    
+    return keys
+
+
+def get_key_order(file_path):
+    """Get the order of keys as they appear in the JSON file.
+
+    Args:
+        file_path (Path): Language file path
+
+    Returns:
+        dict: Dictionary mapping key name (including nested paths) to its position index
+    """
+    try:
+        with open(file_path, 'r', encoding='utf-8') as f:
+            content = f.read()
+            data = json.loads(content)
+        
+        # Collect all keys recursively
+        all_keys = collect_all_keys(data)
+        
+        # Get order by parsing the raw text
+        key_order = {}
+        pattern = r'["\']([^"\']+)["\']\s*:'
+        index = 0
+        
+        # Track nesting path
+        nesting_stack = []
+        
+        for match in re.finditer(pattern, content):
+            key = match.group(1)
+            pos = match.start()
+            
+            # Check nesting level
+            text_before = content[:pos]
+            open_braces = text_before.count('{')
+            close_braces = text_before.count('}')
+            nesting_level = open_braces - close_braces
+            
+            # Build full key path based on nesting
+            if nesting_level == 1:  # Top level
+                nesting_stack = [key]
+                full_key = key
+            elif nesting_level > 1:  # Nested level
+                # Keep only the relevant nesting levels
+                nesting_stack = nesting_stack[:nesting_level - 1] + [key]
+                full_key = ".".join(nesting_stack)
+            else:
+                continue
+            
+            # Only record if this is a valid key we're tracking
+            if full_key in all_keys and full_key not in key_order:
+                key_order[full_key] = index
+                index += 1
+        
+        return key_order
+    except Exception as e:
+        return {}
+
+
+def load_lang_file(file_path):
+    """Load language file and return key set and file content.
+
+    Args:
+        file_path (Path): Language file path
+
+    Returns:
+        tuple: (key set (including nested keys), file content dict, duplicate keys list, key order dict)
+    """
+    try:
+        with open(file_path, 'r', encoding='utf-8') as f:
+            data = json.load(f)
+            # Collect all keys including nested ones
+            all_keys = collect_all_keys(data)
+            duplicates = find_duplicate_keys(file_path)
+            key_order = get_key_order(file_path)
+            return all_keys, data, duplicates, key_order
+    except json.JSONDecodeError as e:
+        print(f"Error: Failed to parse file {file_path}: {e}")
+        return None, None, [], {}
+    except Exception as e:
+        print(f"Error: Failed to read file {file_path}: {e}")
+        return None, None, [], {}
+
+
+def check_lang_keys(langs_dir):
+    """Check if language file keys are complete.
+
+    Uses statistical method: count how many files contain each key, then determine:
+    - Missing keys: keys that exist in most files but not in current file
+    - Extra keys: keys that don't exist in most files but exist in current file
+    - Duplicate keys: keys that appear multiple times in the same file
+
+    Args:
+        langs_dir (str): Language files directory path
+
+    Returns:
+        bool: True if all files have complete keys, False otherwise
+    """
+    langs_path = Path(langs_dir)
+    if not langs_path.exists():
+        print(f"Error: Directory does not exist: {langs_dir}")
+        return False
+
+    # Load all language files
+    lang_keys = {}
+    duplicate_keys_by_file = {}
+    key_order_by_file = {}
+    
+    for lang_file in sorted(langs_path.glob("*.json")):
+        keys, data, duplicates, key_order = load_lang_file(lang_file)
+        if keys is None:
+            continue
+        lang_keys[lang_file.name] = keys
+        if duplicates:
+            duplicate_keys_by_file[lang_file.name] = duplicates
+        key_order_by_file[lang_file.name] = key_order
+
+    if not lang_keys:
+        print("Error: No language files found")
+        return False
+
+    total_files = len(lang_keys)
+    if total_files == 0:
+        print("Error: No valid language files found")
+        return False
+
+    # Count how many files contain each key
+    key_count = defaultdict(int)
+    all_keys = set()
+    
+    for keys in lang_keys.values():
+        all_keys.update(keys)
+        for key in keys:
+            key_count[key] += 1
+
+    # Calculate threshold: if a key exists in more than half of the files, it should exist
+    threshold = (total_files + 1) // 2  # Round up, e.g., 5 files need 3
+
+    # Classify keys: expected keys and unexpected keys
+    expected_keys = {key for key, count in key_count.items() if count >= threshold}
+    unexpected_keys = all_keys - expected_keys
+
+    # Find reference file (file with most keys) for ordering missing keys
+    reference_file = max(lang_keys.items(), key=lambda x: len(x[1]))[0]
+    reference_key_order = key_order_by_file.get(reference_file, {})
+
+    print(f"Checked {total_files} language files")
+    print(f"Threshold: keys need to exist in at least {threshold} files to be considered expected")
+    print(f"Expected keys: {len(expected_keys)}")
+    print(f"Unexpected keys: {len(unexpected_keys)}\n")
+
+    # Check keys for each file
+    all_complete = True
+    file_issues = {}  # {lang_name: {'missing': set, 'extra': set, 'duplicates': list}}
+
+    for lang_name, keys in lang_keys.items():
+        # Find missing keys (should exist but don't exist in current file)
+        missing = expected_keys - keys
+        # Find extra keys (shouldn't exist but exist in current file)
+        extra = keys & unexpected_keys
+        # Get duplicate keys
+        duplicates = duplicate_keys_by_file.get(lang_name, [])
+
+        if missing or extra or duplicates:
+            file_issues[lang_name] = {'missing': missing, 'extra': extra, 'duplicates': duplicates}
+            if missing or duplicates:
+                all_complete = False
+
+    # Output results
+    if all_complete and not file_issues:
+        print("All language files have complete keys!")
+        return True
+
+    # Report issues grouped by file
+    print("Issues found:")
+    print("  Missing keys: exist in most files but not in current file")
+    print("  Extra keys: don't exist in most files but exist in current file")
+    print("  Duplicate keys: keys that appear multiple times in the same file\n")
+    
+    for lang_name in sorted(file_issues.keys()):
+        issues = file_issues[lang_name]
+        missing = issues['missing']
+        extra = issues['extra']
+        duplicates = issues['duplicates']
+        key_order = key_order_by_file.get(lang_name, {})
+        
+        # Sort function for missing keys: use reference file order
+        def sort_missing_by_order(key):
+            return (reference_key_order.get(key, float('inf')), key)
+        
+        # Sort function for extra/duplicate keys: use current file order
+        def sort_by_order(key):
+            return (key_order.get(key, float('inf')), key)
+        
+        has_issues = False
+        if missing or extra or duplicates:
+            has_issues = True
+            print(f"  {lang_name}:")
+
+        # Show extra keys
+        if extra:
+            key_word = "key" if len(extra) == 1 else "keys"
+            print(f"    {len(extra)} Extra {key_word}:")
+            extra_with_count = [(key, key_count[key]) for key in sorted(extra, key=sort_by_order)]
+            if len(extra_with_count) <= 10:
+                for key, count in extra_with_count:
+                    print(f"      - {key} (exists in only {count}/{total_files} files)")
+            else:
+                for key, count in extra_with_count[:10]:
+                    print(f"      - {key} (exists in only {count}/{total_files} files)")
+                print(f"      ... {len(extra_with_count) - 10} more keys not shown")
+
+        # Show missing keys
+        if missing:
+            key_word = "key" if len(missing) == 1 else "keys"
+            print(f"    {len(missing)} Missing {key_word}:")
+            missing_with_count = [(key, key_count[key]) for key in sorted(missing, key=sort_missing_by_order)]
+            if len(missing_with_count) <= 10:
+                for key, count in missing_with_count:
+                    print(f"      - {key} (exists in {count}/{total_files} files)")
+            else:
+                for key, count in missing_with_count[:10]:
+                    print(f"      - {key} (exists in {count}/{total_files} files)")
+                print(f"      ... {len(missing_with_count) - 10} more keys not shown")
+
+        # Show duplicate keys
+        if duplicates:
+            key_word = "key" if len(duplicates) == 1 else "keys"
+            print(f"    {len(duplicates)} Duplicate {key_word}:")
+            for key in sorted(duplicates, key=sort_by_order):
+                print(f"      - {key}")
+
+        if has_issues:
+            print()
+
+    return False
+
+
+def main():
+    parser = ArgumentParser(
+        description="Check if language file keys are complete"
+    )
+    parser.add_argument(
+        "-d", "--dir",
+        default="app/appearance/langs",
+        help="Language files directory path (default: app/appearance/langs)"
+    )
+    args = parser.parse_args()
+
+    # Get project root directory (parent of script directory)
+    script_dir = Path(__file__).parent
+    project_root = script_dir.parent
+    langs_dir = project_root / args.dir
+
+    success = check_lang_keys(langs_dir)
+    exit(0 if success else 1)
+
+
+if __name__ == "__main__":
+    main()
+