I always use an LLM to recraft my comments to ensure they are clear (English isn't my first language). Is that not allowed here?
You might have better luck with prompts that try to adhere better to your intent:
> English is not my first language. Please correct the spelling/grammar and perhaps teach me up to one idiom that would fit well in the following comment, but leave the meat of the message largely the same.
> Please translate the following [franglish/spanglish/(English mixed with a few words from your native language as appropriate to better convey your point)] to English suitable for a forum post.