do dogs howl in different languages?
I suspect they do.
The only evidence I have is anecdotal but hear me out:
I love cat videos (yes, yes, I know, very original) and I've watched hundreds.
One thing I noticed was that cats that came from asia tended to have strange-sounding (to my ears) meows.
Researchers (not sourced, sorry) have discovered that cats meow not for each other but rather as an attempt to communicate with humans.
Might cats adapt their meows regionally to maximize their effect with the folks they're meowing at? This is what I theorize.
So if wolves can howl with regional accents, why couldn't cats/dogs? Albeit for different reasons.