Gateway Display Names etc should be supported by either dynamic translation or the language files
Gateway Display Names and other fields around payment gateways should all be translatable either by dynamic translation or teh language files. Taking the Stripe gateway as an example there are a number of fields and error messages which are in English and not supported by the language files or dynamic translation
ie the name you give the Stripe Gateway is what is shown on the checkout and the pay button is "Pay Now" - again not translatable.
Checkout and payment gateways are areas that can be particularly sensitive to errors due to misunderstanding if not shown in the local language