I had a young Kazakh lad working for me back in the naughties. We were having a quiet time and I spotted him reading a Spanish language book.
"Why are you learning Spanish Adil?" says I
"I'm going there on holiday in 6 months, I should be pretty fluent by then and it's rude to arrive in a country without being able to communicate!"
I shut up at that point as my Kazakh was non-existent and my Russian was seriously ropey! He actually was fluent when he left thus adding Spanish to his stock of other languages: Kazakh, Russian, Turkish and English!