In 我去過巴黎, the letter '過' is wrong. It should be 过.
no, it isn't wrong, it's just that this sentence is written with traditional characters (pay attention to the symbol that appears over the Chinese sentences, if it's a black 汉 it's because the sentence is written with simplified characters, if it's a white character in a black box, it's traditional).
Welcome to tatoeba, by the way :)
Ah, it's true! Sorry... Thanks!