Database and other errors after translating slugs

Hello,

I started translating slugs on my website with Translatepress.
I translated for example north-america from my default language, which is English, to america-del-norte (Spanish) or nordamerika (German)

When I click on a page where the english category slug (north-america) is without the /en/, then it loads.
But when I try the new category slug in german (nordamerika) for example without /de/, it tells me 404 error and when I try the new category slug with the /de/, meaning /de/nordamerika I get an error in my browser saying “ERR_TOO_MANY_REDIRECTS”.
So there is no way for me to access the pages with the non-english slugs.
I also received a database error.

What would be the right solution to do this all?