Missing translation in 'Telefoon' app


Jun 3, 2017
I've update my phone Poco F3 to the latest Xiaomi.eu ROM 12.5.19.
Badly enough there are a lot of translations missing like when you dial a phone number. It presents English instead of Dutch.
The translations which are missing now were already missing before updating my phone.

The latest thread about the translation is from January 2020. So I'm wondering how can I help to update the translations of Xiaomi.eu ROM.