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J’ai ----- J'ai
[ENG] I don't know if it is a known issue, but as you can see, the apostrophe is not the same...
I don't know what kind of keyboard produce this ’ (English quotation mark of Japanese keyboards outputs this symbol) and I know that both symbols are acceptable, but when you input an apostrophe with a French keyboard on Tatoeba (the one on the "4" key), you get ', not ’. Seems like nothing but it prevents duplicates to be merged together... (one more duplicate problem for French ^^)
[FRA] En écrivant avec un clavier français, les apostrophes, sur Tatoeba, sont affichés comme ceci ', non pas comme cela ’. Cette simple différence empêche le bon traitement des doublons.
This is a known issue: https://github.com/Tatoeba/tatoeba2/issues/642