How to change Apple TV language?

The language icon show French only and Prefer AC3 Passthough. There is no other language option. I did not have the opportunity to select language when purchasing, as far as I know.

There should be a language audio icon at the top of the playback controls on the right side. Select that, and choose a different language if available.

click here ➜ Change subtitles or languages for videos in the Apple TV app or iTunes Store - Apple Support

TV shows from the iTunes Store in Canada or France may have one language per store item, meaning that the dubbed version and the original language version can be two separate items in the Store.

If you accidentally purchased the wrong edition, then do contact the iTunes Store staff to help you correct that (undo the purchase and then buy the correct edition).