Translation of nonetheless in Spanish

Let's not forget how we started. We were writing each other very long messages and today we are both much more fluent in both languages. No book could have brought us that far. Cheers.
It certainly is one of the reasons that a student from abroad is not as good in English as people who were born in America. This is an obstacle for all students and a challenge for the educational system.
How are you? I want to meet you when you are in Austria? At the weekend I took the train home, and tomorrow I'm going back again to Karlsruhe in the south of our country. It is near Freiburg.