Do you have to finish one language in order to start another?
Right from the start I jump about 28 skills in Spanish (I had some prior knowledge), and I was wondering if I can learn other languages simultaneously?
You can do several languages at once. You can also learn other languages from other languages. For example: English to Spanish and Spanish to German.
I started yesterday through my iPad, and there was no way to get out of the Spanish lessons or to any type of main menu.