I am not sure about this as I've used Google translate to post in other local boards and had no issues whatsoever, and I remember other members using Google translate to write posts in our local board and again there was no issues.

I think that what it matetrs in the end is how often you do that; if you constantly write in local board using google translate (iirc there was a case like that in Italian board, maybe @fillippone can share more info ) some people might get annoyed (especially if you don't write proper  and simple sentences so google translated posts end up gibberish) so you may end up reported but if you only do it every once in a while, I don't think that locals will mind it.