Racing in other countries are surprisingly easy. Just find the invitation and translate is :) You will see the day when pre sign ups are closing, how much the race costs etc. Usually the fee is double if you sign up on the day.
I would like to point out that the Stockholm area cups has being close as big as whole Swedish Cup is. Mainly the kids classes are big in Stockholm area. Also in Finland Helsinki season final has got lots of foreign riders and awesome prices as well!
The calender doesn't inclue the national champs. Usually those are on the first weekend of July. Finnish Champs for 2015 are on 23th of August.
I hope everyone gets inspired for racing in other countries. That's an awesome way to get to know some locals!! :) Enjoy the planning :)