Translation of leaflet 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.
I've never been to Switzerland, but I've been thinking about visiting it for a long time. Until now I was only in France and Holland. I should take the time and travel and visit new places.
These may be linguistic and cultural differences. There are indeed various regions throughout Spain and the word choice is not always the same. It is sometimes hard to understand people from other cities.