need to improve this as it's used in an automatic file translator

translator-ollama.py

# Define the API endpoint for Ollama
api_url = f"{OLLAMA_API_URL}/v1/chat/completions"

# Construct the prompt with system and user messages
payload = {
    "model": model_name,
    "messages": [
        {
            "role": "system",
            "content": "You are a translation engine. Respond ONLY with the direct translation of the input text. No quotes, no explanations, no additional text, no formatting, no line breaks. Return just the translated text string. Ensure the translation is accurate and matches the original text. Maintain the original formatting and structure of the input text. Handle unexpected API responses gracefully, returning only the desired translation."
        },
        {
            "role": "user",
            "content": f"Translate this text to {target_language}:\n{text}"
        }
    ],
    "stream": False
}