Finish tree golden on 20XP
Is it possible to finish a tree only doing 20XP/day with only doing new lessons when the tree is golden, or will you reach a point where at least 2 lessons will need refreshing each day and you won't be able to make progress.
My sister is doing Spanish and I am thinking about joining her, but I want a light commitment. I could always do one new lesson each day, but that may result in insufficient retention.
I realize that the answer probably depends. I make a lot of mistakes; I would probably not get 100% right doing English from English. I keep my french tree golden, but at 60% complete, I am doing at least 5 a day just to keep it golden (I am pushing ahead pretty agressively; summer and more free time).
I finished the Spanish course in about six months doing 40 XP per day (at first I was doing strengthen 3 and do one new one, but then I stopped doing new ones until my tree was all gold).
Since you're already doing French, you already have a huge head start on any other Romance language, so your plan sounds fairly achievable to me.