[Python-apps-team] Bug#644401: trac: Translations are missing

[ras]

>the problem seems to be a missing Build-Depends on python-babel.

I don't think that localization can magically work without translation files.
In Gentoo we have:

$ equery f trac | grep /locale/
/usr/lib64/python2.7/site-packages/trac/locale/ca
/usr/lib64/python2.7/site-packages/trac/locale/ca/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/ca/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/cs
/usr/lib64/python2.7/site-packages/trac/locale/cs/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/cs/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/de
/usr/lib64/python2.7/site-packages/trac/locale/de/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/de/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/en_GB
/usr/lib64/python2.7/site-packages/trac/locale/en_GB/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/en_GB/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/en_US
/usr/lib64/python2.7/site-packages/trac/locale/en_US/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/en_US/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/eo
/usr/lib64/python2.7/site-packages/trac/locale/eo/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/eo/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/es
/usr/lib64/python2.7/site-packages/trac/locale/es/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/es/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/es_AR
/usr/lib64/python2.7/site-packages/trac/locale/es_AR/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/es_AR/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/fi
/usr/lib64/python2.7/site-packages/trac/locale/fi/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/fi/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/fr
/usr/lib64/python2.7/site-packages/trac/locale/fr/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/fr/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/gl
/usr/lib64/python2.7/site-packages/trac/locale/gl/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/gl/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/he
/usr/lib64/python2.7/site-packages/trac/locale/he/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/he/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/hu
/usr/lib64/python2.7/site-packages/trac/locale/hu/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/hu/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/hy
/usr/lib64/python2.7/site-packages/trac/locale/hy/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/hy/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/it
/usr/lib64/python2.7/site-packages/trac/locale/it/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/it/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/ja
/usr/lib64/python2.7/site-packages/trac/locale/ja/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/ja/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/ko
/usr/lib64/python2.7/site-packages/trac/locale/ko/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/ko/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/nb
/usr/lib64/python2.7/site-packages/trac/locale/nb/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/nb/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/nl
/usr/lib64/python2.7/site-packages/trac/locale/nl/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/nl/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/pl
/usr/lib64/python2.7/site-packages/trac/locale/pl/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/pl/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/pt
/usr/lib64/python2.7/site-packages/trac/locale/pt/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/pt/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/pt_BR
/usr/lib64/python2.7/site-packages/trac/locale/pt_BR/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/pt_BR/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/ro
/usr/lib64/python2.7/site-packages/trac/locale/ro/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/ro/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/ru
/usr/lib64/python2.7/site-packages/trac/locale/ru/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/ru/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/sl
/usr/lib64/python2.7/site-packages/trac/locale/sl/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/sl/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/sv
/usr/lib64/python2.7/site-packages/trac/locale/sv/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/sv/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/tr
/usr/lib64/python2.7/site-packages/trac/locale/tr/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/tr/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/zh_CN
/usr/lib64/python2.7/site-packages/trac/locale/zh_CN/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/zh_CN/LC_MESSAGES/messages.mo
/usr/lib64/python2.7/site-packages/trac/locale/zh_TW
/usr/lib64/python2.7/site-packages/trac/locale/zh_TW/LC_MESSAGES
/usr/lib64/python2.7/site-packages/trac/locale/zh_TW/LC_MESSAGES/messages.mo

In Debian, the following command returns no lines:
$ dpkg -L trac | grep /locale/