I like that Kenji said the reason for "somewhere in Southeast Asia" is that even though you can tell that much of The Furious is shot in Bangkok, he didn't want to specify a country and make it look bad on screen. He felt that's been done to Thailand enough in cinema
The amount of talent in "The Furious" can't be understated. Besides the main cast, like @DerekBrocks highlights, theres a large contingent of very talented Thai stuntmen in it
The fellow with the afro who plays the ninja baddie in the insanely underrated BKO: Bangkog Knockout