At the time email-validator does not support other languages in its error messages.
This leads us to check for the error messages and then replace them with our own messages which can be translated.
This is just a hacky solution which is causing trouble, like in the newest version where some messages has changed.

We need this messages in English and German. But i think developers of other countries would love to see the error messages an their language as well :).

If needed I will assist you on this task to translate to German.