I don't think there is any rule for anyone to not use a translator to understand what someone is writing on a local board that isn't their native language board, it's not like you are doing something wrong, everyone has the right to read what is written publicly in the forum, local boards are open to everyone to visit and read and observe if they want to, you are not supposed to participate using a translator since it isn't your local board, but there are exceptions to that as well in my opinion but only if it's very important.
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Xal0lex is one of the moderators in our local thread,
Pakistan, and he often posts there when he needs to, and when he does that, he writes the post in English first, and then write its translation in Urdu, the native language of the board, right below his message. Look at
this example. Since it's not his native language, he probably uses a translator to do that.
So it's not like you are going to get banned or anything for doing that, but whether it's considered good or bad depends on what your intentions are.
P.S.: Don't take that example too seriously, it was just for reference. He is a moderator and he has to monitor the board and has obligations, and one shouldn't take that as an example to misuse this thing.