My name is***** am sorry to hear that you are having this issue.
I will be glad to assist you with this.
Follow these steps please
1. Tap the menu button the top right of the screen, which looks like three horizontal lines.
Then Tap Settings. настройки
2. Tap the arrow next to Device Options. варианты устройств3rd arrow from top.
3. Tap the arrow next to Personalize Your Kindle.Персонализация Kindle4th arrow from top.
4. Tap the arrow next to Language. 1st arrow
5. Select the language you wish to change to and tap Ok.
6. Tap OK on the next pop-up. This will cause your Kindle Paperwhite to restart.