I know from experience that some [mathematical-journals] from France allow French submissions. And on the arXiv you can see now and then a math paper in French and not only in English.
I've checked the submission guidelines from "Science China Mathematics", "Peking Mathematical Journal" and "Acta Mathematica Sinica" (both the English Series and the Chinese Series) and they accept only submissions in English. Although, it is called "Chinese Series", this series also only accepts English submissions. I don't know other recognized Chinese math journals except these three.
Hence, the question: Which recognized mathematical journal accepts [chinese-language-submissions]? It must not be necessarily a journal published in China but most likely will be. The higher the impact factor and the more top-notch, the more I would be interested in it.