My mobile phone is unique, and it always has language information on it. How can I change it?

My mobile phone is Vito Xiaoqiao C 1, which is particularly difficult to use. It was broken several times, repaired several times, changed two pieces, and finally applied for a new one. It was the same problem last time, and I kept prompting unread information, no; I didn't notice. Later, a girl saw it and told me that it was the rhythm that the mobile phone was going to break down. In addition, there are other problems with mobile phones. The mobile phone is still under warranty, so I went back to apply for a new one because I have changed a part. Later, I got it back. There was a black screen problem on the dial keyboard the other day. I called the maintenance service point, and he said, let your system recover. After the system is restored, the general problem will be solved, that is, trouble. You can also try.