Despite the fact that I generally favor realism in my Hideouts & Hoodlums campaigns, I still subscribe to the comic book convention of having everyone you encounter able to speak English. I do know of one H&H Editor (hi Darren!) who is more of a stickler, wants more realism, and tracks what languages the Heroes know, based on their backstories more than their Intelligence scores.
(Although comics.org suggests that Bob Powell may have wrote this story, the timeliness and anti-Nazi stance seems very Will Eisner to me.)
(Scans courtesy of Comic Book Plus.)