I like to imagine that while there might be a universal "standard" language to make interplanetary communication easier (ex: Koppaite text is also found on the S.S. Shepherd among several other places), everyone's accents and dialects are still different depending on their home planet!!
this in mind. it is nearly IMPOSSIBLE to tell right away where Bernard is from. this is because he uses so much lingo from different places he's been to and pronounces certain words in a Variety of different ways that it can be hard to trace if you haven't known him long enough