They have chips (Callie mentions it as her favourite food in several quotes, all the american ones completely disregarded it) sundaes and apparently waffles (Urchin Underpass quotes, waffles for japan, sundaes for EU). They mention fruit, although I think it was in the artbook and strange fruit was shown (
http://prntscr.com/91hhlc). In the Eating Sleeping fest, Callie also mentions chocolate and cheese.
'salted squid is a delicacy' is just weird since the original Japanese source never said anything like that so I wouldn't actually take that seriously since 60% of the quotes were changed in meaning entirely. It'd practically be cannibalism.
They also seem to have marshmallows (not sure about hot dogs) and other things.
I also think they have some form of food liquid or not in the vending machines.
I tend to take the EU version as seriously as the JP version since the EU version tries very hard to be closer to the source material, and Japan is where the game came from so I take it the most seriously.