refac: follow up prompt template

backend/open_webui/config.py

@@ -1565,7 +1565,7 @@ FOLLOW_UP_GENERATION_PROMPT_TEMPLATE = PersistentConfig(
 )
 
 DEFAULT_FOLLOW_UP_GENERATION_PROMPT_TEMPLATE = """### Task:
-Suggest 3-5 relevant follow-up questions or prompts that the user might naturally ask next in this conversation as a **user**, based on the chat history, to help continue or deepen the discussion.
+Suggest 3-5 relevant follow-up questions or prompts in the chat's primary language that the user might naturally ask next in this conversation as a **user**, based on the chat history, to help continue or deepen the discussion.
 ### Guidelines:
 - Write all follow-up questions from the user’s point of view, directed to the assistant.
 - Make questions concise, clear, and directly related to the discussed topic(s).