In Arabic it's "Kazir" قذر

发臭 = Stinky in Chinese or 臭豆腐 dependant on context.

Puant - stinky in French.

Cochino

🙋‍♀️😁🤪🤭

Trump
This word, meaning “to fart,” dates back to the 15th century. It’s also been used as a noun since the early 20th century. Either way, it's derived from the sound of a trumpet, which makes total sense.

I know you wanted non English, but how about a U.K. English slang for “stinky”.
Whiffy.

“Mashkawimaagwad”
In Ojibwe.
You could call him or her “Mashka”.

https://ojibwe.lib.umn.edu/main-entry/mashkawimaagwad-vii

خانز (khanz) in the Moroccan dialect of Arabic

Squancho

puant

I once named a puppy "Stinky", but he was so bumbling and dumb and cute I would call him, "Tinky Tinky Tinky!!!" in a silly voice, and he would wiggle and waggle and he just loved it!

Nee-Oi, correct spelling Nioi...stinky in Japanese!

Kiratsa...Basque for stinky.

Smrdljiv

PUZZA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :)

Whiffy

Pong

Pepe LePew! 🤣🤣🤣

臭い
Kusai
in Japanese