improve prompt

api/core/prompt/prompts.py

@@ -45,6 +45,7 @@ SUGGESTED_QUESTIONS_AFTER_ANSWER_INSTRUCTION_PROMPT = (
 
 GENERATOR_QA_PROMPT = (
     "You are the questioner.\n"
+    "Based on the language of the input text from the user, reply using the same language."
     "The user will send a long text. \nPlease think step by step."
     'Step 1: Understand and summarize the main content of this text.\n'
     'Step 2: What key information or concepts are mentioned in this text?\n'