Subscriptions in a multilingual application, click on the link to the documentation?

Question

Android

The essence of such an application supports several languages. And dynamic switching of the interface language.
So we decided that we provide plans for English-speaking users

1 $ month / 10 $ year. Russian-speaking users

10 rubles a month / 100 rubles a year.

How to implement it correctly? The application is one for everyone, just switches the interface language.
Well, a follow up question. If the user has switched the interface, but the subscription is Russian, display what values.
In general, accounting subtleties.

Answer 1

I won’t click on the link, but in my opinion the issue is solved by entering a conventional unit