Multilingual Simplified Chinese

Question:
I want to choose the simplified Chinese at multilingual app.

Product:
Wix Studio

What are you trying to achieve:
I want to change add simplified Chinese at booking function page.

What have you already tried:
[Share resources, forum topics, articles, or tutorials you’ve already used to try and answer your question.]

Additional information:
At the booking page, it not allow me to edit translation manually, and it automatically translated to traditional Chinese, and I can not change it.