Tongtong:
I do not quite understand your question, but I will attempt to answer what I think you're asking.
PMI offers the PMP exam in several languages. It's the PMP Handbook:
www.pmi.org/-/media/pmi/documents/public...4f-9007-e95c1998c920
That is the current handbook, and I do not see anywhere on their site that they are restricting the exam to English only.
You should probably study and take the exam in the language that you are most comfortable with, provided that language is offered for the exam.
Hope that helps,
Harry