When changing the language, the currency does not change!

Hello! We have your plugin and the polylang plugin, and sometimes users complain that when changing the language, the currency does not change. Even now I check, I put the language in English, and the currency costs rubles. Sometimes it happens that on the contrary they put the Russian language, and the currency remains dollars. What is the problem?

In the settings, I set the default currencies for the languages ​​of the polylang plugin.

We use xstore themes.