Sure, there are some aspects that aren’t perfect, though there may be other scripts as well. That’s just the first one that came up in the search for me. I don’t know what you mean by data expiring. As far as I know, added synonyms survive even account resets (like my own).
As I said above, their model is that they want you to do it the way they teach it one time, for whatever reason. I don’t know if they’ve ever explicitly said why it’s set up that way, but since this has come up many times I’m guessing there’s some thought process behind the decision.



But with the old script it was also possible to add synonyms for items on locked levels via their details pages, which would vanish for days or weeks until you complete the lesson.