Hello,
we just start testing tool  Weblate for czech translation of Koha.
 Weblate support:
- GIT integration
- qualitty control
- translation context
- automated translation process
- access control etc.
- Twiiter and Facebook propagation
More information http://weblate.org/en/

Our translation
http://hosted.weblate.org/projects/koha/

BR

Mike