Translation of fluctuate in Spanish

I'm Ricky. I am learning English at school here in Switzerland and at the same time I am learning Italian. You writing skills are very good. Where did you go on your last vacation? See you next week.
I wish you also a successful and happy 2008. On New Year's Eve I was here in Costa Rica and I've looked after my 6 weeks old daughter, no holiday in sight. She is not sleeping well at night yet.
I am glad that you accepted my offer. I would like to write letters and emails in English and if you want you can write back to me in German. I want to correct your German and so we will both get better.