Certain texts with a lot of offensive words will apparently trigger guardrails of some kind, causing it to only output "I’m sorry, I can’t assist with that." instead of translating the text.
One example I found is a giant block of text that (using Google Translate) turned out to be the "Navy Seal Copypasta" translated into Finnish. Removing one of the first sentences then actually causes it to state "I'm not going to translate that." in place of any translation.
You can look it up what that text is (an old meme, not a real threat) and you'll probably understand why, but it should still just translate the text and not have "opinions" on what you're translating, especially without any other context.