The following entries in linguas.desc are not valid (see also BCP 47 validator http://schneegans.de/lv/): en_EN - English locale "EN" is not a valid region subtag. me - Montenegrin (Crnogorski) locale "me" is not a valid language tag. ns - Northern Sotho locale "ns" is not a valid language tag. Presumably, "nso - Northern Sotho locale" should be used instead. ru_RU_0 - Russian locale for Russia Not well-formed. Then there is also: es_LA - Spanish locale for Latin America This is technically valid, but "LA" is the region subtag of Laos, not Latin America which has "419". An entry for es_419 exists and should be used instead.
fake_bidi jp ru_gold ven
Furthermore, the following invalid entries are used in the tree, but not listed in linguas.desc: fake_bidi www-client/google-chrome{,-beta,-unstable} jp app-text/tesseract dev-lang/ifc ru_gold games-strategy/ja2-stracciatella ven /media-gfx/digikam media-plugins/kipi-plugins
All fixed, removed, or migrated to L10N. Closing.