I thought with john being negotiator it'd make sense for him to know a couple of extra languages inlcuding perhaps sign language. Characters know 12 languages by default (which should be ample to cover any dialect found in game but I will say if you encounter an unfamiliar one).

[Quote=Silverwind Blade] ARGH YOUR POSTS ARE FINE, STOP WORRYING[/quote]

Thanks for the pre-formatted, quotable response Silver!