Eine alternative wäre auch: "Das verstehe ich nicht" it sounded a little like a robot in the way you said it. Or just VERY simple: "Was?" And if you don't know that, "was" means "what" :)
@Your average girl I just said that I'm happy to see someone that can speak a little German :) And...tbh your sentence made me a little laugh. The words are correct but the sentence structure is very weird. The correct sentence would be: "ooo! Uhh ...ich kann das nicht verstehen--" But it's still pretty good! Are you English? Cuz the sentence structure is exactly how it would be in English. Sorry if my English is a little weird to read cuz I'm not really good at English...
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I'm still learning the language 😅 but I'm glad I can understand the bare minimum in your comment......
@Lexi I SAW A FUC**** 7 YEAR OLD ON THIS PLATFORM And 13 isn't even that young. I think it's pretty normal to read sm** stuff like this with 13. But yeah. I dunno.