["pnb"] = {"Punjabi"}, -- Western Panjabi
["psu"] = {"Shauraseni"}, -- Sauraseni Prākrit
["rap"] = {"Rapa Nui"}, -- Rapanui
["rar"] = {"Cook Islands Māori"}, -- Rarotongan, Cook Islands Maori
["rmu"] = {"Scandoromani"}, -- Tavringer Romani
["rom"] = {"Romani"}, -- Romany
["rup"] = {"Aromanian"}, -- Macedo-Romanian, Aromanian, Arumanian
["rus"] = {"Russian"}, -- not in IANA; see code ru
["ryu"] = {"Okinawan"}, -- Central Okinawan
-- ["sah"] = {"Sakha"}, -- Yakut; article moved to Yakut with this disucssion: Talk:Yakut_language#Requested_move_21_September_2015
["sdc"] = {"Sassarese"}, -- Sassarese Sardinian
["sdn"] = {"Gallurese"}, -- Gallurese Sardinian
["sga"] = {"Old Irish"}, -- Old Irish (to 900)
["shp"] = {"Shipibo"}, -- Shipibo-Conibo
["skr"] = {"Saraiki"}, -- Saraiki, Seraiki; same as first in IANA list, delete?
["src"] = {"Logudorese"}, -- Logudorese Sardinian
["sro"] = {"Campidanese"}, -- Campidanese Sardinian
["tkl"] = {"Tokelauan"}, -- Tokelau
["tvl"] = {"Tuvaluan"}, -- Tuvalu
["tyv"] = {"Tuvan"}, -- Tuvinian
["vls"] = {"வட விளமிய மொழி"}, -- Vlaams
["war"] = {"Waray"}, -- Waray (Philippines)
["wep"] = {"Westphalian"}, -- Westphalien
["xal"] = {"Oirat"}, -- Kalmyk, Oirat
["xal-RU"] = {"கல்மிக்கு மொழி"},
["xcl"] = {"Old Armenian"}, -- Classical Armenian
["yua"] = {"Yucatec Maya"}, -- Yucateco, Yucatec Maya  
-- non-standard codes
["bat-smg"] = {"Samogitian"}, -- bat = Baltic languages (639-2); dialect of Lithuanian has it's own IANA code sgs; bat-smg
["be-x-old "] = {"Belarusian (Taraškievica)"}, -- be = Belarusian; x-old = private use tag; be-x-old.wikipedia.org; space char in index may indicate that this code not used
["cbk-zam"] = {"சவகான மொழி"}, -- cbk = Chavacano; zam = Zamboangueño? zam is not an IANA-registered extlang; cbk-zam.wikipedia.org
-- ["cg"] = {"Montenegrin", "sr-ME"}, -- IANA / ISO 639-3 code is cnr
["en-emodeng"] = {"ஆரம்பகால நவீன ஆங்கிலம்"}, -- emodeng is not an IANA-registered variant
["fiu-vro"] = {"Võro"}, -- fiu = Finno-Ugrian languages (639-2); vro = Võro (639-3); fiu-vro.wikipedia.org
["gkm"] = {"Medieval Greek", "grc"},
["grc-gre"] = {"Greek", "grc"}, -- grc = Ancient Greek (to 1453); gre not an IANA-registered code; used by Template:lang-grc-gre
["map-bms"] = {"Banyumasan"}, -- dialect of Javanese; map = Austronesian languages (639-2); bms is an IANA registered code not related to Javanese; map-bms.wikipedia.org
["roa-rup"] = {"Aromanian"}, -- roa = Romance languages (639-2); rup = Macedo-Romanian, Aromanian, Arumanian (639-3); roa-rup.wikipedia.org
["roa-tara"] = {"Tarantino"}, -- roa = Romance languages (639-2); tara is not an IANA registered script; roa-tara.wikipedia.org
["simple"] = {"Simple English"}, -- simple is not an IANA registered variant; simple.wikipedia.org
["zh-classical"] = {"Classical Chinese"}, -- zh = Chinese; classical is not an IANA-registered variant; zh-classical.wikipedia.org
["zh-min-nan"] = {"மின்னான் மொழி"}, -- zh-min-nan = Minnan, Hokkien, Amoy, Taiwanese, Southern Min, Southern Fujian, Hoklo, Southern Fukien, Ho-lo; granfathered in IANA, nan preferred; zh-min-nan.wikipedia.org
["zh-yue"] = {"கண்டோனீயம்"} -- zh-yue = Cantonese; redundant in IANA, yue preferred; zh-yue.wikipedia.org
}