fix: interpretaion workflow language error massage

app.py

@@ -104,8 +104,9 @@ def interpretation_workflow(text: str, genre: str, learn_language: str, target_l
 	if not text or text.strip() == "":
 		yield "Error: Text is empty"
 		return
-	if not learn_language or target_language:
+	if not learn_language or not target_language:
 		yield "Error: Language not selected"
+		return
 
 	if genre.lower() in ["general", "news"]:
 		result = get_interpretation(genre.lower(), gemini_key, text, learn_language, target_language)