How do I change the language settings on my iPhone?

I see that your iPhone’s text language is in Russian. Go to Settings > General > Language and Region > Add Language > Set to English or whichever other language you want > Then you will be prompted if you want to set it as your primary language, so yes.

Change the language on your iPhone or iPad - Apple Support

I have made this path below for you to follow if you can’t read the text.