No there is still reasons to learn a foreign language - it enhances your thinking.
I’m currently learning a new language (slowly) and it changes the way I think about certain concepts. The further into it I get, the more I notice it - it’s like an expansion in the brains processing abilities (or at least that’s how it feels to me).
Additionally, there are just some things I think in the new language - that I would just not think or say in English because it would not make sense.
In New Zealand we seem to find that our 2 languages, English and Te Reo Maori, each have their uses. English is good for lots of stuff but Te Reo is where we find our connection to the land.
A few learn Sanskrit, which is said to be the language of mystics.