I don't believe there's any issue, as long as the substantive body of the post is in English (in addition to the source language, if applicable), as per this Meta SEthis Meta SE post:
It is not, nor has it ever been, our goal to be the one place in the world for all programming information in every possible human language.
- Direct question posters to native language resources.
- It is not the community's goal to teach English.
- The question asker should put some effort into the question.
As long as the question is in salvageable English and makes some modicum of sense, it should be edited and improved like any other post.
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I say keep it in English. I'm not against diversity or other languages, I'm for us all being able to communicate under one. This isn't political, this isn't about smothering peoples cultures with Western ideologies. It is about being pragmatic.
I tend to agree with the majority of the answers in response to that post, except that unlike programming, law is not so English-oriented. Certainly, as we've previously discussed there seems to be a willingness to see the original documents in the source language, and indeed we've had a couple of examples of non-English jurisdiction questions