Implement then possibility of setting a languege on a Subsite. All content on the subsite and below the subsite will be delivered with the chosen language
pep8
Use SelectionWidget to list all available languages (not only supported - all)
Implement a diffrent language switch concept based on the forcelanguage field
Fix getting subsites in selector / add simple languageswitch test
test availabilitx of the languagswitch
Add edge case tests for languageswitcher
Remove unecessary code
Remoce test for list, no longer necessary since the field is multivalued
Fix comments in handlers.py
Remove debug info
Simplify get_nav_root function and add tests