Revert "Use youtube language codes as-is (#452)"
Revert "Use youtube language codes as-is (#452)"

This reverts commit 27ad96fda5168bd8cf18bf4bf33e8cc1bbbc0eef.

ofer43211/unisubs,ReachingOut/unisubs,ofer43211/unisubs,ofer43211/unisubs,pculture/unisubs,eloquence/unisubs,ofer43211/unisubs,eloquence/unisubs,wevoice/wesub,wevoice/wesub,pculture/unisubs,ReachingOut/unisubs,norayr/unisubs,pculture/unisubs,norayr/unisubs,ReachingOut/unisubs,eloquence/unisubs,pculture/unisubs,norayr/unisubs,ReachingOut/unisubs,norayr/unisubs,eloquence/unisubs,wevoice/wesub,wevoice/wesub