Generally what we do if we can't translate easily ourselves is close it, if it is a question, and ask the poster to redo it in English, as Music.SE is an English speaking site. For answers, we leave a comment asking them to edit into English and then we delete the post. Once edited it can easily be undeleted.
Interestingly, using google translate I can see what they were trying to get at, but it isn't easy to figure out correctly, so I have deleted it for now.