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docker_svc/agent/app/libs/manage_languages.py

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+# libs/manage_languages.py
+
+from langdetect import detect
+from fastapi import HTTPException
+import logging
+
+logger = logging.getLogger(__name__)
+
+def validate_language(language: str) -> None:
+    """Validate the language parameter. Throws an HTTPException if the language is invalid."""
+    valid_languages = {"french", "italian", "english", "german", "auto"}
+    if language not in valid_languages:
+        raise HTTPException(
+            status_code=400,
+            detail="Invalid language. Must be one of: french, italian, english, german, or auto"
+        )
+
+def detect_language(current_message: str) -> str:
+    """Detect the language of the current message. Defaults to French if detection fails."""
+    try:
+        detected_lang = detect(current_message)
+        if detected_lang == "fr":
+            language = "french"
+        elif detected_lang == "it":
+            language = "italian"
+        elif detected_lang == "en":
+            language = "english"
+        elif detected_lang == "de":
+            language = "german"
+        else:
+            language = "french"
+        logger.info(f"Detected language: {language}")
+        return language
+    except Exception as e:
+        logger.error(f"Language detection failed: {str(e)}")
+        return "french"