Change Login/Registration Page Text

Hello Nextcloud community =)

I tried the German support, however I did not get an answer to my question. I hope you guys can help me despite my language barrier:

Nextcloud version: 25.0.2
Hoster: Webhosting 8000 SE de a1 (netcup)
PHP version: 8.1.13
Database? MySql

I want to change the text on the login/registration page, and try it in the lang-Files

lib/l10n/de.js
lib/l10n/de.json
lib/l10n/de_DE.js
lib/l10n/de_DE.json

However, I can’t find “account name or email” or “password” (both in German) in these files.

Where do I find them?

In the config I have already set ‘default_language’ => ‘de’,. Which of the above files is that?

Greetings,

rais