diff --git a/libs/gtkmm2ext/po/el_GR.po b/libs/gtkmm2ext/po/el.po
similarity index 100%
rename from libs/gtkmm2ext/po/el_GR.po
rename to libs/gtkmm2ext/po/el.po
diff --git a/libs/gtkmm2ext/po/es_ES.po b/libs/gtkmm2ext/po/es.po
similarity index 100%
rename from libs/gtkmm2ext/po/es_ES.po
rename to libs/gtkmm2ext/po/es.po
diff --git a/libs/gtkmm2ext/po/pl_PL.po b/libs/gtkmm2ext/po/pl.po
similarity index 100%
rename from libs/gtkmm2ext/po/pl_PL.po
rename to libs/gtkmm2ext/po/pl.po
diff --git a/libs/gtkmm2ext/po/pt_BR.po b/libs/gtkmm2ext/po/pt.po
similarity index 100%
rename from libs/gtkmm2ext/po/pt_BR.po
rename to libs/gtkmm2ext/po/pt.po
diff --git a/libs/gtkmm2ext/po/ru_RU.po b/libs/gtkmm2ext/po/ru.po
similarity index 100%
rename from libs/gtkmm2ext/po/ru_RU.po
rename to libs/gtkmm2ext/po/ru.po