Translation of insidious in German

I have started learning only one month ago, that was during the summer holidays, I want to go to Canada for three weeks and then participate in a course. I hope that I will improve it more or less.
Anyway, I will add the 'offending' word feature within a few hours and write you an email once it is up and we will give it a try. Do you agree? Did you get my message? When do you want to start translating for me?
Many thanks for the nice emails. I visit this site on the Internet all the time, but I have not visited your blogs. Your country is certainly an interesting country and it has mountains and snow.