The BBC reports that researchers have found that cows have regional accents. Apparently birds do as well, although some farmers suggest a human cause that wouldn’t be appropriate for birds:
Farmer Lloyd Green, from Glastonbury, said: “I spend a lot of time with my ones and they definitely moo with a Somerset drawl.”
Logically, then, French cows should have French accents, German cows should have German accents, etc. I would love to hear a Geordie moo.