why don't many movie trailers use the audio option in youtube ?

https://preview.redd.it/y81atc3ebjfe1.png?width=780&format=png&auto=webp&s=b09639108521be49b5ec8aec163eaf0f0425748c

i have been wondering when pan Indian movies just releases various versions of their trailers , when they can just add audio languages to make it into a single video