This seems like a case of comparing apples and oranges. Human language processing is largely based on sounds and requires extensive immersion to even be able to differentiate sounds, syllables, words, tone, etc. That is—you need a lot of training to even figure out what to look up (ignoring the tech-assisted technology that is still extremely rough in my experience).
There's no parallel to programming languages even in the slightest. Especially once you recognize patterns across syntaxes, the immediate value of understanding any one programming language plummets to near zero. Exceptions might be:
- SQL, just a singularly useful syntax to internalize. Probably also goes for datalog if you use that.
- Bash
Actually, that's all I can think of.