What benefit is there to sending players on intensive language programs? Does this actually make a difference?

This game always recommends sending players who don't speak the language on an intensive language course, but does this actually any tangible impact?

I guess it doesn't cost much to send them, so I'm more just curious if there's actually any difference made, whether it improves their performance, helps with squad dynamics/moral, and maybe affects their transfer value and any contract negotiations?

Or is it just a minor immersion feature with little real effect?