While "plateau" is used in English and many other languages, there isn't a specific "foreign form" of the word. It's already adopted into many languages as a loanword.
However, here are some examples of how the word "plateau" is used in other languages:
* Spanish: meseta
* Italian: altopiano
* German: Hochebene
* Russian: плато (plato)
* Japanese: 高原 (kōgen)
* Chinese: 高原 (gāoyuán)
These are just a few examples, and many other languages have their own words for "plateau."