I thought: let's do some of the older lessons again, just to see if I still know everything I learned so far.
So I went to the first lesson, basics Spannish 1 - lesson 1. But instead of getting questions from the first lesson, i get questions about everything I learned so far AND I'm getting all kinds of words I didn't even learned yet.
Isn't it possible to just redo the old lessons to see if you've grown and know the stuff already?
(Hope I could explain this well, since English isn't my foreign language).
The Basics 1 and Basics 2 lessons get updated as you complete more lessons. It's usually simple, common words that get added into the lesson; you won't have to do complicated verb translations in Basics 1 and 2.
I think most of the other lessons don't change as you progress. I find it very helpful to redo old lessons often. Good luck!