l10n: renamed fi_FI to fi (ISO 639-1)
l10n: renamed nb_NO to nb (ISO 639-1)
l10n: renamed vi_VN to vi (ISO 639-1)
l10n: renamed fa_IR to fa (ISO 639-1)
l10n: renamed it_IT to it (ISO 639-1)
l10n/sv: Swedish catalog updated by Jonas Lind.
l10n: renamed sv_SE to sv (ISO 639-1)
l10n/el: Greek catalog updated by Aristotelis Mertis
l10n: renamed el_GR to el (ISO 639-1)
l10n: renamed pl_PL to pl (ISO 639-1)