Translation of aplacar

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.
Thank you for your email! A little question about yourself. How old are you? I think the Americans are using the word color and not colour, but I understand if you are not sure about it.
I teach at the university of natural sciences. I have studied at the ETH in Zurich. At that time I started learning Spanish and I found Vocabulix. Since then I'm using it regularly with joy.