Thread:Support/Fallback and reuse of messages on translatewiki

User:Geitost tells, that he does not see the german translation for some user groups on Special:ListGroupRights. He is using the language "de-ch" which fallbacks to "de". For interface language "de" all is right.

For example (See [ Special:ListGroupRights with uselang=de-ch]) the following messages are shown in english.
 * group-import
 * group-staff
 * group-offline
 * group-translator

It is possible to get the fallback work here? Thanks.