here's a few.

dis.4ct.org/lounge
bbs.progrider.org/lounge
world2ch.org/board

2ch actually has some boards foreigners can post on. for example yomogi.2ch.net/english , although there's only a thread or two in full english. there were a ton more boards added after they got 8ch.

as far as I can tell, most people here seem to think 4ct and progrider are shit, although they're pretty good funposting-wise.