I have tried many 2 things that I've seen on this forum to switch AE to English language, it didn't work.
First I've changed my Adobe CC language to English (International) and it re-downloaded all my apps. I opened AE, it was still in French.
Then I've added a ae_force_english.txt file in my root Documents user subfolder, opened AE, still in French.
Would like some help on this one please.
PS : I would like all my apps in English so if you find a global solution it is fine to me .
Nobody can tell you anything without proper system info or other technical details.
When you go in "édition" -> "préférences" , you probably (it that in my adobe cc apps) have a section with "language", switch it to english and it's done