To set your mind further at ease: I ran a Find Any File search for "strings," and it found upwards of 1/4 MILLION of them, all of which - the ones I looked at, anyhow, because scrolling through the entire list would have taken all day - are associated with .lproj folders, which support languages in macOS.
You can actually delete all but the en.lproj folders (unless you need more than one language on your MBP), and there's an app that purports to do it, but it doesn't necessarily do a good job, and doing it by hand would take the rest of your life, but if you're reeeally stuck for space on your drive, running the app is a viable way to regain some (but I don't suggest it...buy a bigger drive).
