I have created tracker bug https://bugs.gentoo.org/586734 for the LINGUAS to L10N conversion, and started to file bugs for individual packages. (Starting with lightweight stuff like metapackages, so users won't spend too much time with rebuilding if they don't get their L10N configuration immediately right.)
However, it looks like filing bugs for all affected packages is going to be tedious. Therefore I am asking for permission to update ebuilds for the easy cases directly, e.g. when the change is only a simple renaming from linguas_* to l10n_*. Please speak up if you don't want your packages to be touched and prefer bugs to be filed for them. Ulrich
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