is acquiring languages a skill or just knowledge ?

[omar30]

I am interested in learning many languages will this give me dividends in the long term.

[Carl-Richard]

It's a skill in the sense that practice matters. The key to learning a language is to actually speak it regularly, every single day. The way they teach 2nd/3rd languages in school is essentially a waste of time. My Spanish is terrible despite having had 5 years of "education".