Verb conjugation of "souscrire" 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 will be here for another 3 hours, then about 2 hours offline and then again online until late. So the exception is in Spain, cause formal is usually vos/ustedes even when we speak to 1 person. They also jump to the third person singular.
I live right next to Montpellier, in a small town near the coast, in France. I have no children and I'm learning Spanish because I like foreign languages. I learn vocabulary and grammar. Vocabulix helps me a lot.