There was this post Asking questions completely in Chinese (~8 years ago), where there was a conclusion that asking and answering questions in Chinese is fine. It was subsequently affirmed Your input:...
It seems there is mixed guidance about this.
On meta, it's possible to find a few, very old threads about this:
Questions about resources for learning chinese
FAQ: What is On topic ...
A lot of translation tagged questions have useless titles:
Can someone translate what these say?
Translate this sentence for me
Is this translation good?
Could you please confirm or provide a better ...