Change the language in the application (on the fly)

Hello. Does anyone know how to enable a user (probably an anonymous user) in the application (on the first page) to choose one of the offered languages (english-default, german)? The application has no login (sign in). The examples on the forum are not the best clear to me. Do I need a widget?   EDIT:   
1 answers

Hi Petar,

Kindly have look on below mentioned link, may be it will be helpful foe you.