How is GNOME translated upstream
The localization of upstream GNOME applications and documentation is described and coordinated from the GNOME Translation Project (GTP).
There you will find resources and information on how to translate GNOME, how to join a translation team, translations statistics and much more. In addition, the GNOME i18n mailing list is used for general coordination of the GNOME internationalization and localization effort.
GNOME does not use a web translation frontend for their translations. Instead, translations (PO files, xml and docbook files, etc.) are made directly available at the GNOME statistics site. Depending on the particular version you want to translate, you'll have to choose the right link where to get the files from.
How to get in touch or join a GNOME translation team
If you are interested in both translating Ubuntu and cooperating with upstream translations, we encourage to join or get in touch with your local GNOME translation team in addition to your Ubuntu translation team.
You simply have to go to the list of GNOME translation teams, find your team in the list and follow the instructions on how to join or contact them. If you cannot find a team for your language in the list, it might be a good opportunity to request the creation of one.
In addition, you can also subscribe to the general GNOME i18n mailing list to be kept up to date with the latest developments and announcements in the GNOME translations world.
How to contribute translations back to upstream
The general workflow for contributing translations back to upstream is the following
Locating the upstream translations: mapping of Ubuntu/GNOME modules and versions
If you'd like to send the translations you've done in Launchpad back to the GNOME project, the following lists will help you determine where to send those translations depending on the Ubuntu version you've been translating:
Submitting translations to GNOME
You've got several options for this:
Contact the GNOME translation team for your particular language and send them the translation(s). This is generally the easiest way
Report a bug to GNOME's Bugzilla and attach the translation(s) as a patch. You will need to register an account there first.