Polylang switches automatically to default..

Hello people,

I am using Polylang plugin to make my website multilingual. But when I select German (2nd language) and than click on a page, it switches automatically to my default language.

How should I organize the pages and set them to the right language?

Note: Some of my pages called the same in the different languages (Like>> English = Service and German = Service)

Please help me.

Thank you very much..