Thank you for the response. Yes, this was the first we tried, but the error persisted. We were then able to fix it by ourselves by updating all bundles to the latest version. So now things are fixed, thank you again.

Same bug is happening here...

Dear Nicole and Ivy, Thank you very much for your swift reaction and response. This helped. Ack, so as of now, there is no direct way to do that, and I will upvote it through SuiteIdeas. For consistent internationalization, this is an minor, but yet essential feature. Best regards, Markus