Need help setting up: Auto detect Language Polylang not working?

We are setting up currency conversion based on the language on the website. Auto detect: Language Polylang
But it still needs to be fixed; please help me see if I’ve missed any process.

I want it to run JS, not change the URL automatically, and not show the money transfer button on the web -> everything automatically just depends on the Polylang language.

For example:
– URL /vi -> unit VND
– The remaining central language unit is USD