Most of the sound are in english language, however to make this mod "100% american" will suffice to change the crash dive sound with another one (or leave the original). Moreover the engine sound is related to german u-boat MAN diesel engines...not good for 4 Fairbank Morse 38D1/8 or General Motors 278A generators.
It's an awesome Mod, and it takes a fes minutes to make it PERFECT.
Excellent mod Poul!!
Work best on an ultra-real WWII scenario.