Localisation updates from http://translatewiki.net.

Change-Id: Id11acace1d9cbbdd261f95947eef4c6ec74304b8
Stop trying to pull forms that don't exist. Instead, if there is
a problem, try one that looks remotely related to what the donor
appears to be trying to do.

Change-Id: Ia4d03990e7bf8695d40d2d412ad29a5248f63c83