Translation of unbrauchbar

I left the smaller regions out. Do you think they are important? There are some terms that are specifically used in Ecuador. Let's leave it as it is now. Time will show us within a few days if we need them all or not.
In order to quickly become successful, one would have to change certain points, at least in my opinion: After 5 months of learning, I have still not found the grammar practice on which I should concentrate.
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.