Verb conjugation of "stimuler" in French

In order to improve the language skills we changed some features on Vocabulix. From now on users can not only drill isolated lesson but adhere to a specific lesson plan. That means that they can set goals and seek help from other users.
I've been working on and off on the dictionary during the entire week, and I'll spend some more hours on it this coming weekend. Sometimes he would get a bit mixed up and use formal Castilian sometimes instead of informal.
My family and I live in Frankfurt. I love South American literature, Jewish music, winter sports, and of course the time with my family. What do you do in your spare time? Reading Spanish books too?