wrong currency

Hi,
I’ve written my own currency plugin (I store the price in a custom meta field) and I force EUR on the non-default language (I use polylang).
Let’s say the default currency is PLN and for the english language it’s EUR. Everything works fine with other gateways, but when the customer wants to pay with Stripe Apple Pay / Google Pay, it still uses the PLN price.
How can I fix this so Stripe uses the correct EUR price?