Streaming rights for the French version and the English dub are often sold separately. Netflix may have the rights to the French audio, while a smaller distributor holds the dubbing rights. This fragmentation means you cannot simply switch languages on most platforms.
If you have English audio due to a visual impairment or reading difficulty, search for the UK DVD release (2012) which contains an English descriptive audio track. For everyone else, turn on the French audio and English subtitles—you will thank us later. the intouchables english audio