Where is the rest of the worlds languguages?

Here. I can help.
mkvmerge --list-languages

English language name | ISO639-2 code | ISO639-1 code
---------------------------------------------------------------------------------+---------------+--------------
Abkhazian | abk | ab
Achinese | ace |
Acoli | ach |
Adangme | ada |
Adyghe; Adygei | ady |
Afar | aar | aa
Afrihili | afh |
Afrikaans | afr | af
Afro-Asiatic languages | afa |
Ainu | ain |
Akan | aka | ak
Akkadian | akk |
Albanian | alb | sq
Aleut | ale |
Algonquian languages | alg |
Altaic languages | tut |
Amharic | amh | am
Angika | anp |
Apache languages | apa |
Arabic | ara | ar
Aragonese | arg | an
Arapaho | arp |
Arawak | arw |
Armenian | arm | hy
Aromanian; Arumanian; Macedo-Romanian | rup |
Artificial languages | art |
Assamese | asm | as
Asturian; Bable; Leonese; Asturleonese | ast |
Athapascan languages | ath |
Australian languages | aus |
Austronesian languages | map |
Avaric | ava | av
Avestan | ave | ae
Awadhi | awa |
Aymara | aym | ay
Azerbaijani | aze | az
Balinese | ban |
Baltic languages | bat |
Baluchi | bal |
Bambara | bam | bm
Bamileke languages | bai |
Banda languages | bad |
Bantu languages | bnt |
Basa | bas |
Bashkir | bak | ba
Basque | baq | eu
Batak languages | btk |
Beja; Bedawiyet | bej |
Belarusian | bel | be
Bemba | bem |
Bengali | ben | bn
Berber languages | ber |
Bhojpuri | bho |
Bihari languages | bih | bh
Bikol | bik |
Bini; Edo | bin |
Bislama | bis | bi
Blin; Bilin | byn |
Blissymbols; Blissymbolics; Bliss | zbl |
Bokmål, Norwegian; Norwegian Bokmål | nob | nb
Bosnian | bos | bs
Braj | bra |
Breton | bre | br
Buginese | bug |
Bulgarian | bul | bg
Buriat | bua |
Burmese | bur | my
Caddo | cad |
Catalan; Valencian | cat | ca
Caucasian languages | cau |
Cebuano | ceb |
Celtic languages | cel |
Central American Indian languages | cai |
Central Khmer | khm | km
Chagatai | chg |
Chamic languages | cmc |
Chamorro | cha | ch
Chechen | che | ce
Cherokee | chr |
Cheyenne | chy |
Chibcha | chb |
Chichewa; Chewa; Nyanja | nya | ny
Chinese | chi | zh
Chinook jargon | chn |
Chipewyan; Dene Suline | chp |
Choctaw | cho |
Church Slavic; Old Slavonic; Church Slavonic; Old Bulgarian; Old Church Slavonic | chu | cu
Chuukese | chk |
Chuvash | chv | cv
Classical Newari; Old Newari; Classical Nepal Bhasa | nwc |
Classical Syriac | syc |
Coptic | cop |
Cornish | cor | kw
Corsican | cos | co
Cree | cre | cr
Creek | mus |
Creoles and pidgins | crp |
Creoles and pidgins, English based | cpe |
Creoles and pidgins, French-based | cpf |
Creoles and pidgins, Portuguese-based | cpp |
Crimean Tatar; Crimean Turkish | crh |
Croatian | hrv | hr
Cushitic languages | cus |
Czech | cze | cs
Dakota | dak |
Danish | dan | da
Dargwa | dar |
Delaware | del |
Dinka | din |
Divehi; Dhivehi; Maldivian | div | dv
Dogri | doi |
Dogrib | dgr |
Dravidian languages | dra |
Duala | dua |
Dutch, Middle (ca.1050-1350) | dum |
Dutch; Flemish | dut | nl
Dyula | dyu |
Dzongkha | dzo | dz
Eastern Frisian | frs |
Efik | efi |
Egyptian (Ancient) | egy |
Ekajuk | eka |
Elamite | elx |
English | eng | en
English, Middle (1100-1500) | enm |
English, Old (ca.450-1100) | ang |
Erzya | myv |
Esperanto | epo | eo
Estonian | est | et
Ewe | ewe | ee
Ewondo | ewo |
Fang | fan |
Fanti | fat |
Faroese | fao | fo
Fijian | fij | fj
Filipino; Pilipino | fil |
Finnish | fin | fi
Finno-Ugrian languages | fiu |
Fon | fon |
French | fre | fr
French, Middle (ca.1400-1600) | frm |
French, Old (842-ca.1400) | fro |
Friulian | fur |
Fulah | ful | ff
Ga | gaa |
Gaelic; Scottish Gaelic | gla | gd
Galibi Carib | car |
Galician | glg | gl
Ganda | lug | lg
Gayo | gay |
Gbaya | gba |
Geez | gez |
Georgian | geo | ka
German | ger | de
German, Middle High (ca.1050-1500) | gmh |
German, Old High (ca.750-1050) | goh |
Germanic languages | gem |
Gilbertese | gil |
Gondi | gon |
Gorontalo | gor |
Gothic | got |
Grebo | grb |
Greek, Ancient (to 1453) | grc |
Greek, Modern (1453-) | gre | el
Guarani | grn | gn
Gujarati | guj | gu
Gwich'in | gwi |
Haida | hai |
Haitian; Haitian Creole | hat | ht
Hausa | hau | ha
Hawaiian | haw |
Hebrew | heb | he
Herero | her | hz
Hiligaynon | hil |
Himachali languages; Western Pahari languages | him |
Hindi | hin | hi
Hiri Motu | hmo | ho
Hittite | hit |
Hmong; Mong | hmn |
Hungarian | hun | hu
Hupa | hup |
Iban | iba |
Icelandic | ice | is
Ido | ido | io
Igbo | ibo | ig
Ijo languages | ijo |
Iloko | ilo |
Inari Sami | smn |
Indic languages | inc |
Indo-European languages | ine |
Indonesian | ind | id
Ingush | inh |
Interlingua (International Auxiliary Language Association) | ina | ia
Interlingue; Occidental | ile | ie
Inuktitut | iku | iu
Inupiaq | ipk | ik
Iranian languages | ira |
Irish | gle | ga
Irish, Middle (900-1200) | mga |
Irish, Old (to 900) | sga |
Iroquoian languages | iro |
Italian | ita | it
Japanese | jpn | ja
Javanese | jav | jv
Judeo-Arabic | jrb |
Judeo-Persian | jpr |
Kabardian | kbd |
Kabyle | kab |
Kachin; Jingpho | kac |
Kalaallisut; Greenlandic | kal | kl
Kalmyk; Oirat | xal |
Kamba | kam |
Kannada | kan | kn
Kanuri | kau | kr
Kara-Kalpak | kaa |
Karachay-Balkar | krc |
Karelian | krl |
Karen languages | kar |
Kashmiri | kas | ks
Kashubian | csb |
Kawi | kaw |
Kazakh | kaz | kk
Khasi | kha |
Khoisan languages | khi |
Khotanese; Sakan | kho |
Kikuyu; Gikuyu | kik | ki
Kimbundu | kmb |
Kinyarwanda | kin | rw
Kirghiz; Kyrgyz | kir | ky
Klingon; tlhIngan-Hol | tlh |
Komi | kom | kv
Kongo | kon | kg
Konkani | kok |
Korean | kor | ko
Kosraean | kos |
Kpelle | kpe |
Kru languages | kro |
Kuanyama; Kwanyama | kua | kj
Kumyk | kum |
Kurdish | kur | ku
Kurukh | kru |
Kutenai | kut |
Ladino | lad |
Lahnda | lah |
Lamba | lam |
Land Dayak languages | day |
Lao | lao | lo
Latin | lat | la
Latvian | lav | lv
Lezghian | lez |
Limburgan; Limburger; Limburgish | lim | li
Lingala | lin | ln
Lithuanian | lit | lt
Lojban | jbo |
Low German; Low Saxon; German, Low; Saxon, Low | nds |
Lower Sorbian | dsb |
Lozi | loz |
Luba-Katanga | lub | lu
Luba-Lulua | lua |
Luiseno | lui |
Lule Sami | smj |
Lunda | lun |
Luo (Kenya and Tanzania) | luo |
Lushai | lus |
Luxembourgish; Letzeburgesch | ltz | lb
Macedonian | mac | mk
Madurese | mad |
Magahi | mag |
Maithili | mai |
Makasar | mak |
Malagasy | mlg | mg
Malay | may | ms
Malayalam | mal | ml
Maltese | mlt | mt
Manchu | mnc |
Mandar | mdr |
Mandingo | man |
Manipuri | mni |
Manobo languages | mno |
Manx | glv | gv
Maori | mao | mi
Mapudungun; Mapuche | arn |
Marathi | mar | mr
Mari | chm |
Marshallese | mah | mh
Marwari | mwr |
Masai | mas |
Mayan languages | myn |
Mende | men |
Mi'kmaq; Micmac | mic |
Minangkabau | min |
Mirandese | mwl |
Mohawk | moh |
Moksha | mdf |
Mon-Khmer languages | mkh |
Mongo | lol |
Mongolian | mon | mn
Mossi | mos |
Multiple languages | mul |
Munda languages | mun |
N'Ko | nqo |
Nahuatl languages | nah |
Nauru | nau | na
Navajo; Navaho | nav | nv
Ndebele, North; North Ndebele | nde | nd
Ndebele, South; South Ndebele | nbl | nr
Ndonga | ndo | ng
Neapolitan | nap |
Nepal Bhasa; Newari | new |
Nepali | nep | ne
Nias | nia |
Niger-Kordofanian languages | nic |
Nilo-Saharan languages | ssa |
Niuean | niu |
No linguistic content; Not applicable | zxx |
Nogai | nog |
Norse, Old | non |
North American Indian languages | nai |
Northern Frisian | frr |
Northern Sami | sme | se
Norwegian Nynorsk; Nynorsk, Norwegian | nno | nn
Norwegian | nor | no
Nubian languages | nub |
Nyamwezi | nym |
Nyankole | nyn |
Nyoro | nyo |
Nzima | nzi |
Occitan (post 1500) | oci | oc
Official Aramaic (700-300 BCE); Imperial Aramaic (700-300 BCE) | arc |
Ojibwa | oji | oj
Oriya | ori | or
Oromo | orm | om
Osage | osa |
Ossetian; Ossetic | oss | os
Otomian languages | oto |
Pahlavi | pal |
Palauan | pau |
Pali | pli | pi
Pampanga; Kapampangan | pam |
Pangasinan | pag |
Panjabi; Punjabi | pan | pa
Papiamento | pap |
Papuan languages | paa |
Pedi; Sepedi; Northern Sotho | nso |
Persian | per | fa
Persian, Old (ca.600-400 B.C.) | peo |
Philippine languages | phi |
Phoenician | phn |
Pohnpeian | pon |
Polish | pol | pl
Portuguese | por | pt
Prakrit languages | pra |
Provençal, Old (to 1500); Occitan, Old (to 1500) | pro |
Pushto; Pashto | pus | ps
Quechua | que | qu
Rajasthani | raj |
Rapanui | rap |
Rarotongan; Cook Islands Maori | rar |
Reserved for local use: qaa | qaa |
Reserved for local use: qad | qad |
Romance languages | roa |
Romanian; Moldavian; Moldovan | rum | ro
Romansh | roh | rm
Romany | rom |
Rundi | run | rn
Russian | rus | ru
Salishan languages | sal |
Samaritan Aramaic | sam |
Sami languages | smi |
Samoan | smo | sm
Sandawe | sad |
Sango | sag | sg
Sanskrit | san | sa
Santali | sat |
Sardinian | srd | sc
Sasak | sas |
Scots | sco |
Selkup | sel |
Semitic languages | sem |
Serbian | srp | sr
Serer | srr |
Shan | shn |
Shona | sna | sn
Sichuan Yi; Nuosu | iii | ii
Sicilian | scn |
Sidamo | sid |
Sign Languages | sgn |
Siksika | bla |
Sindhi | snd | sd
Sinhala; Sinhalese | sin | si
Sino-Tibetan languages | sit |
Siouan languages | sio |
Skolt Sami | sms |
Slave (Athapascan) | den |
Slavic languages | sla |
Slovak | slo | sk
Slovenian | slv | sl
Sogdian | sog |
Somali | som | so
Songhai languages | son |
Soninke | snk |
Sorbian languages | wen |
Sotho, Southern | sot | st
South American Indian languages | sai |
Southern Altai | alt |
Southern Sami | sma |
Spanish; Castilian | spa | es
Sranan Tongo | srn |
Standard Moroccan Tamazight | zgh |
Sukuma | suk |
Sumerian | sux |
Sundanese | sun | su
Susu | sus |
Swahili | swa | sw
Swati | ssw | ss
Swedish | swe | sv
Swiss German; Alemannic; Alsatian | gsw |
Syriac | syr |
Tagalog | tgl | tl
Tahitian | tah | ty
Tai languages | tai |
Tajik | tgk | tg
Tamashek | tmh |
Tamil | tam | ta
Tatar | tat | tt
Telugu | tel | te
Tereno | ter |
Tetum | tet |
Thai | tha | th
Tibetan | tib | bo
Tigre | tig |
Tigrinya | tir | ti
Timne | tem |
Tiv | tiv |
Tlingit | tli |
Tok Pisin | tpi |
Tokelau | tkl |
Tonga (Nyasa) | tog |
Tonga (Tonga Islands) | ton | to
Tsimshian | tsi |
Tsonga | tso | ts
Tswana | tsn | tn
Tumbuka | tum |
Tupi languages | tup |
Turkish | tur | tr
Turkish, Ottoman (1500-1928) | ota |
Turkmen | tuk | tk
Tuvalu | tvl |
Tuvinian | tyv |
Twi | twi | tw
Udmurt | udm |
Ugaritic | uga |
Uighur; Uyghur | uig | ug
Ukrainian | ukr | uk
Umbundu | umb |
Uncoded languages | mis |
Undetermined | und |
Upper Sorbian | hsb |
Urdu | urd | ur
Uzbek | uzb | uz
Vai | vai |
Venda | ven | ve
Vietnamese | vie | vi
Volapük | vol | vo
Votic | vot |
Wakashan languages | wak |
Walloon | wln | wa
Waray | war |
Washo | was |
Welsh | wel | cy
Western Frisian | fry | fy
Wolaitta; Wolaytta | wal |
Wolof | wol | wo
Xhosa | xho | xh
Yakut | sah |
Yao | yao |
Yapese | yap |
Yiddish | yid | yi
Yoruba | yor | yo
Yupik languages | ypk |
Zande languages | znd |
Zapotec | zap |
Zaza; Dimili; Dimli; Kirdki; Kirmanjki; Zazaki | zza |
Zenaga | zen |
Zhuang; Chuang | zha | za
Zulu | zul | zu
Zuni | zun |