The handling of language was explained in one of the episodes at least. I've not seen anyone in this thread bringing up how messed up the handling of timezones is, though.
I thought they managed the timezones well, it wasn't day everywhere at once, dawn in London, night somewhere else. Was day when Sun was walking in Seoul, and night for Capheus in Nairobi. It actually stood out to me that they actually handled it pretty well, unlike most other shows and movies (Heroes and it's global solar eclipse, stands out here).
What exactly was poorly handled though? Something I missed maybe.