add support for different languages on the success/feedback page

[hiddenmind3]

Description:

Add language support for the "thank you" after pressing the blue download button on the "welcome" page.

Acceptance criteria:

• eng/ger

Sketches / Mockups:

[thomasbuechi]

Added language support for the "thank you" page as seen in the mockup from issue #51

Open: Right now we have 2 different Strings for creating the try again String since we have a_href link in it Maybe there is an option in quarkus to only needing 1 link