GOGWesker: Despite the fact that GOG only has the English versions available, I know for a fact that both Crusader games were released back in the day in the following languages.

Crusader: No Remorse

-English (audio and text)
-German (audio and text)
-French (audio and text)
-Spanish (text only)

Crusader: No Regret

-English (audio and text)
-German (audio and text)
-Spanish (text only)

Yeah, for some reason a French language version of Crusader: No Regret was never done despite the fact that Crusader: No Remorse was fully localized in French.

Does anyone know if other language versions exist for both games? It seems that neither of them were translated to Italian. And maybe they were translated to Portuguese in Brazil but I'm not sure.

GOGWesker: That's great, for the German people at least.

It seems that aside from the ones I already listed, there weren't more language versions released for both games (or at least nobody knows here, something which was expected I guess), so you need the German, French and Spanish versions of Crusader: No Remorse and the Spanish version of Crusader: No Regret.

In fact, I can easily point you to the Spanish versions of both Crusader games if you need them.