I studied modern languages at university back in the day.
Two languages, both studied from A-Level - I think it was pretty unusual to start any languages from scratch then, unless they were unusual ones not taught in schools and everyone was going to be a beginner.
Friend’s child is studying one language at A level and thinking about degree level. My advice has been sought due to my own experience, but it seems so different now.
Lots of places offering triple mod lang degrees, letting you start 2 of the languages from beginner level.
It seems a lot of work to me! I mean, my degree was a lot of work, and I’d already been studying those languages for 6 years+ when I started.
I was going to advise friend’s Dd either to just take the language she is already studying, and think really carefully about whether to add a maximum of one at beginner level, but am I hopelessly out of touch? I don’t see how you can do more than scratch the surface with doing 3, even if you had studied them all before!