Programming languages are just one subset of tools used by programmers. Therefore, simply counting how many languages one knows is simplistic. It's not incidental that high-rated CS curricula don't spent most of the courses teaching new programming languages. I know amazing polyglot programmers who just know 3-4 languages.
As a related note, learning new syntax is by far the least useful aspect of learning a new language. Coincidentally, it's also the easiest element to pick up and takes little time at all. Incorporating new paradigms into your way of thinking takes far longer.