In the English dub, minced oath words like "heck", "darn", "crud", "goodness" and "gosh" are mostly used, and mild language are rare, with little to none, such as "hell", "damn", "bastard", "ass", "piss" and "crap".
Mild but still a decent amount for a tv-14 show.
In the sub version Gohan calls buu a r*tard.
Nothing really outside of the aforementioned scenes of pervertedness. There is some mild to moderate profanity.
Words like damn, idiot, imbecile and (occasionally) ass are used.
A few middle fingers are seen throughout the show.