The german string in the field reads as "Weiter-suchen". The hyphen makes it weird. This has been changed a couple months ago and was fine before as far as I remember.
Please see attached screenshot.
This new "translation" popped up in the recent months and every time I see it it doesn't feel right at all.
How to reproduce the issue:
Open any Excel Online document with German language settings.
Press [CTRL] + [F] to open the search field.
Notice the button with the string "Weiter-suchen"
Request:
Please remove the hyphen in the string "Weiter-suchen" for the specified button.
https://www.duden.de/rechtschreibung/weitersuchen
https://de.wiktionary.org/wiki/weitersuchen
https://www.wortbedeutung.info/weitersuchen/
Thanks for taking this into consideration.