https://www.123deutsch.com/cursos/
What you are looking for! Would you like to try our Online German Language Course? We offer German language course for those who need a certificate to apply for a Visa.
https://www.123deutsch.com/suscripciones/
You are looking for advance online German language course. Take our German language online classes and practice online. Day by day learn vocabulary and grammar which will make you perfect.
Learn German Online Course
That's! Either this gave you some inspiration to start your own 30-day language adventure or you think I'm crazy. In any case, let me know what you think of my experiment!