ScpMergeTarget files are not generated in master for a while, therefore Windows installer displays STR_NAME_FOO strings instead of en-US or localized strings, when --with-lang is used in configure. I bisected and I found that first bad commit is 6cad907b9e6b2f37f0ffd81154ef16322b8217c7. When I reverted this commit, the problem did not occur. However, I did not understand how it could be related.
It is the dir dep in gb_CustomTarget_ulfex_rule.
David Tardon committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=1f78e02a2a9205f2c8f8132395ed1d60da3e0058 fdo#70487 fix l10n of install sets The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.