Verb conjugation of "diminish" in English

The billing of additional working hours is not justified, since it was our request to download the software and wait for the new version. They have admitted the error of the translation.
Anyway, there are a lot of people on board and I no matter how high the waves may be, I always suffer from nausea or seasickness. I have not been on a small boat before. I will have to vomit.
I now live in Spain. I have moved too 2 years ago. I have finished my studies and in February I'm going to high school. I have not spoken German for a long time, actually since I was a kid.