Character languages sure

Marisa speaks Japanese and several arcane languages not meant for any mortal

Dave Speaks English and he lived pretty far south so maybe a few phrases in Spanish

Edgar speaks whatever the fuck language they speak on planet FF6

Tyabur speaks English, but he knows a few words of Angelic.

Which is an incredibly complicated language.

Djinn spoke their own dialect of it that was slightly different from the version actually spoken by Angels

Older Djinn have the power of tongues, and can literally speak any language, though, and his parents spoke mostly English after they moved to America, because they wanted Tyabur to be a normal American

Dipper speaks English, whatever

Duane speaks at least three languages

There's whatever the fuck fantasy language that is translated as English, there's Tainish, the common tongue of Alderode, and there's the First Tongue

and arcane language that allows you to command the world around you and have it obey

an*

AND Mr. Spender speaks English obviously, but also High Spirit (badly)

As to speak it properly you have to be a spirit that is at least a hundred years old, and Spender is neither of these things

Edgar speaks chainsaw and other machine