| haqHa | haq | Niger–Congo | | 990,000 | 6a · Vigorous |
| hbuHabun | hbu | Austronesian | | | 6b · Threatened |
| ayhHadhrami Arabicاللهجة الحضرمية | ayh | Afroasiatic | +5 | 4.5 m | 6a · Vigorous |
| hdyHadiyya | hdy | Afroasiatic | | | 4 · Educational |
| htsHadza | hts | Khoisan | | 800 | 6b · Threatened |
| pnnHagahai | pnn | — | | | 5 · Developing |
| hahHahon | hah | Austronesian | | | 6a · Vigorous |
| haiHaidaX̱aat Kíl | hai | — | | 90 | |
| hnmHainanese | hnm | Sino-Tibetan | +1 | 1.1 m | |
| bzxHainyaxo Bozo | bzx | Niger–Congo | | | 6a · Vigorous |
| hgmHaiǁom | hgm | Khoisan | | | 6a · Vigorous |
| hafHaiphong Sign Language | haf | Vietnamese sign languages | | | 6a · Vigorous |
| hasHaisla | has | Wakashan | | | 7 · Shifting |
| hatHaitian CreoleKreyòl ayisyen | hat | — | | 9.6 m | 1 · National |
| hvcHaitian Vodoun Culture Language | hvc | — | | | 9 · Second language only |
| hjiHajibahasa Haji | hji | — | | | 6a · Vigorous |
| hajHajong | haj | Indo-European | | | 5 · Developing |
| cnhHakha–Chin | cnh | Sino-Tibetan | | 125,000 | 3 · Wider Communication |
| hakHakka ChineseHak-kâ-ngî | hak | Sino-Tibetan | +1 | 48.2 m | 5 · Developing |
| haoHakö | hao | Austronesian | | | 6a · Vigorous |
| hlbHalbi | hlb | Indo-European | | | 3 · Wider Communication |
| hlaHalia | hla | Austronesian | | | 5 · Developing |
| hurHalkomelem | hur | Salishan | | 285 | 8a · Moribund |
| hmuHamapbahasa Hamap | hmu | Trans–New Guinea | | | 6b · Threatened |
| hbaHamba | hba | Niger–Congo | | | 6a · Vigorous |
| amfHamer | amf | Afroasiatic | | | 6a · Vigorous |
| haaHänHäł gołan | haa | Na-Dene | | 19 | 8b · Nearly Extinct |
| hagHanga | hag | Niger–Congo | | | 5 · Developing |
| hniHaniHaqniqdoq | hni | Sino-Tibetan | | 740,000 | 6a · Vigorous |
| cszHanis | csz | — | | | 9 · Dormant |
| habHanoi Sign Language | hab | Vietnamese sign languages | | | 6a · Vigorous |
| hnnHanunó'o | hnn | Austronesian | | | 5 · Developing |
| harHarari | har | Afroasiatic | | 25,810 | 4 · Educational |
| hojHarauti | hoj | — | | | 5 · Developing |
| hroHaroi | hro | Austronesian | | | 6a · Vigorous |
| hssHarsusi | hss | Afroasiatic | | | 7 · Shifting |
| tmdHaruai | tmd | — | | | 5 · Developing |
| hrkHaruku | hrk | Austronesian | | | 8a · Moribund |
| bgcHaryanviہریاݨوی | bgc | Indo-European | | 14 m | 6a · Vigorous |
| hrzHarzandi | hrz | Indo-European | | | 7 · Shifting |
| ybjHasha | ybj | Niger–Congo | | | 6b · Threatened |
| meyHassaniya Arabic | mey | Afroasiatic | +1 | 3.8 m | 3 · Wider Communication |
| hadHattambahasa Moile | had | — | | | 5 · Developing |
| xhtHattic | xht | — | | | |
| hauHausa | hau | Afroasiatic | +5 | 43.9 m | 2 · Provincial |
| hslHausa Sign Languagemaganar hannu | hsl | — | | | 6a · Vigorous |
| yufHavasupai-Walapai-Yavapai | yuf | Hoka-Sioux | | | 6b · Threatened |
| hvkHaveke | hvk | — | | | 7 · Shifting |
| havHavu | hav | Niger–Congo | | | 6a · Vigorous |
| hpsHawaiʻi Sign LanguageHoailona ʻŌlelo o Hawaiʻi | hps | — | | | 8b · Nearly Extinct |
| hawHawaiian‘Ōlelo Hawai‘i | haw | Austronesian | | 26,205 | 2 · Provincial |
| hwcHawaiian Pidgin | hwc | — | | 700,000 | 5 · Developing |
| hvnHawu | hvn | Austronesian | | 110,000 | 5 · Developing |
| hayHaya | hay | Niger–Congo | | | 5 · Developing |
| hazHazaragiآزرگی | haz | Indo-European | | 2.2 m | 5 · Developing |
| xedHdi | xed | Afroasiatic | | | 5 · Developing |
| hebHebrewעברית | heb | Afroasiatic | | 9.3 m | 1 · National |
| hehHehe | heh | Niger–Congo | | | 5 · Developing |
| hbnHeiban | hbn | — | | | 7 · Shifting |
| heiHeiltsuk-Oowekyala | hei | Wakashan | | 90 | 7 · Shifting |
| hegHelongbahasa Helong | heg | Austronesian | | | 5 · Developing |
| hemHemba | hem | Niger–Congo | | | 6a · Vigorous |
| hedHerdé | hed | Afroasiatic | | | 6a · Vigorous |
| herHereroOtsiherero | her | Niger–Congo | | 237,000 | 4 · Educational |
| llfHermit | llf | Austronesian | | | 8b · Nearly Extinct |
| hrtHértevin | hrt | Afroasiatic | | | 8b · Nearly Extinct |
| hamHewa | ham | Sepik | | | 6a · Vigorous |
| aukHeyo | auk | Torricelli | | | 6a · Vigorous |
| hibHibitoŠiwi | hib | — | | | 10 · Extinct |
| hidHidatsahiraaciré’ | hid | Hoka-Sioux | | | 7 · Shifting |
| mbaHigaonon | mba | — | | 30,000 | 5 · Developing |
| chqHighland Chinantec | chq | Central American Indian languages | | | 6a · Vigorous |
| kjkHighland Konjobahasa Konjo Pegunungan | kjk | Austronesian | | | 6b · Threatened |
| chdHighland Oaxaca Chontal | chd | — | | | 8a · Moribund |
| azzHighland Puebla Nahuatl | azz | Uto-Aztecan | | | 5 · Developing |
| acwHijazi Saudi | acw | Afroasiatic | | 6 m | 6a · Vigorous |
| hijHijuk | hij | Niger–Congo | | | 6b · Threatened |
| hilHiligaynon | hil | Austronesian | | 5.7 m | 3 · Wider Communication |
| mrjHill MariМары йӹлмӹ | mrj | Uralic | | 30,000 | 6b · Threatened |
| hnaHina | hna | Afroasiatic | | | 6a · Vigorous |
| hinHindiहिन्दी | hin | Indo-European | +1 | 615.3 m | 1 · National |
| hiiHinduri | hii | — | | | 6a · Vigorous |
| ginHinukh | gin | Northeast Caucasian | | 5 | 6b · Threatened |
| hmoHiri Motu | hmo | Austronesian | | 120,000 | 3 · Wider Communication |
| hitHittite𒌷𒉌𒅆𒇷 | hit | Indo-European | | | Extinct |
| htuHitu | htu | — | | | 6b · Threatened |
| hiwHiw | hiw | Austronesian | | | 6a · Vigorous |
| hixHixkaryana | hix | — | | 600 | 4 · Educational |
| licHlai | lic | Kra–Dai | | 700,000 | 6a · Vigorous |
| yhlHlepho Phowa | yhl | Sino-Tibetan | | | 6b · Threatened |
| hleHlersu | hle | Sino-Tibetan | | | 6b · Threatened |
| bwnHm Nai | bwn | Hmong–Mien | | | 7 · Shifting |
| hmrHmar | hmr | Sino-Tibetan | | | 4 · Educational |
| hmnHmong | hmn | Hmong–Mien | +1 | 4.5 m | 5 · Developing |
| mwwHmong Daw | mww | Hmong–Mien | | | 5 · Developing |
| hmvHmong Dô | hmv | Hmong–Mien | | | 6a · Vigorous |
| hmfHmong Don | hmf | Hmong–Mien | | | 6a · Vigorous |
| hnjHmong Njua | hnj | Hmong–Mien | +1 | | 6a · Vigorous |
| hmzHmong Shua | hmz | Hmong–Mien | | | 6a · Vigorous |
| hocHo𑢹𑣉𑣉 𑣎𑣋𑣜 | hoc | Austroasiatic | | 1.5 m | 5 · Developing |
| hosHo Chi Minh City Sign Language | hos | Vietnamese sign languages | | | 6a · Vigorous |
| hoaHoava | hoa | Austronesian | | | 6b · Threatened |
| hohHobyót | hoh | Afroasiatic | | | 8a · Moribund |
| yauHodï | yau | — | | 900 | 6a · Vigorous |
| hoiHolikachuk | hoi | Na-Dene | | | 9 · Dormant |
| hoyHoliya | hoy | Dravidian | | | 6b · Threatened |
| hooHoloholo | hoo | Niger–Congo | | | 6a · Vigorous |
| holHolu | hol | Niger–Congo | | | 6a · Vigorous |
| homHoma | hom | — | | | 10 · Extinct |
| hdsHonduran Sign Language | hds | — | | | 5 · Developing |
| juhHõne | juh | Niger–Congo | | | 7 · Shifting |
| hksHong Kong Sign Language | hks | — | | | 6a · Vigorous |
| hopHopiHopilàvayi | hop | Uto-Aztecan | | 6,780 | 6b · Threatened |
| horHoro | hor | Nilo-Saharan | | | 10 · Extinct |
| hoeHorom | hoe | Niger–Congo | | | 6a · Vigorous |
| eroHorpa | ero | Sino-Tibetan | | | 6b · Threatened |
| hrrHorurubahasa Horuru | hrr | Austronesian | | | |
| hotHote | hot | Austronesian | | | 5 · Developing |
| htiHotibahasa Hoti | hti | Austronesian | | | 10 · Extinct |
| hovHovongan | hov | — | | | 6b · Threatened |
| hozHozo | hoz | Mao | | | 7 · Shifting |
| hpoHpon | hpo | Sino-Tibetan | | | 9 · Dormant |
| hraHrangkhol | hra | — | | | 5 · Developing |
| hreHrê | hre | Austroasiatic | | | 5 · Developing |
| hruHruso | hru | — | | | 6b · Threatened |
| huoHu | huo | Austroasiatic | | | 6b · Threatened |
| hugHuachipaeri | hug | — | | | 6b · Threatened |
| qubHuallaga QuechuaWallaqa rimay | qub | Quechua | | 40,000 | 5 · Developing |
| hubHuambisa | hub | Jivaroan-Cahuapanan | | 8,000 | 5 · Developing |
| cloHuamelula | clo | — | | | 8b · Nearly Extinct |
| uamHuamoé | uam | — | | | 9 · Dormant |
| varHuarijio | var | Uto-Aztecan | | 2,136 | 6a · Vigorous |
| husHuastec | hus | Central American Indian languages | | 150,000 | 5 · Developing |
| mauHuautla Mazatec | mau | Central American Indian languages | | | 6a · Vigorous |
| qwhHuaylas Ancash Quechua | qwh | Quechua | | | 6b · Threatened |
| teeHuehuetla Tepehua | tee | Totonacan | | 1,500 | 6a · Vigorous |
| hchHuichol | hch | Uto-Aztecan | | 47,625 | 5 · Developing |
| huhHuilliche | huh | — | | | 8b · Nearly Extinct |
| czhHuizhou Chinese | czh | Sino-Tibetan | | 4.6 m | 6a · Vigorous |
| huwHukuminabahasa Bambaa | huw | Austronesian | | | 10 · Extinct |
| hulHula | hul | Austronesian | | 3,240 | 5 · Developing |
| huyHulaulá | huy | — | | 10,000 | 8a · Moribund |
| huiHuli | hui | — | | | 5 · Developing |
| hukHulung | huk | Austronesian | | 10 | 10 · Extinct |
| hmbHumburi Senni | hmb | Nilo-Saharan | | | 6a · Vigorous |
| hutHumla | hut | — | | | 6a · Vigorous |
| bcsHumono | bcs | Niger–Congo | | | 6a · Vigorous |
| hkeHunde | hke | Niger–Congo | | | 6a · Vigorous |
| hnuHung | hnu | Austroasiatic | | | 7 · Shifting |
| hunHungarianmagyar nyelv | hun | Uralic | +5 | 12.6 m | 1 · National |
| hshHungarian Sign Language | hsh | — | | 300,000 | 5 · Developing |
| natHungworo | nat | Niger–Congo | | | 6a · Vigorous |
| hkkHunjara-Kaina Ke | hkk | Trans–New Guinea | | 8,770 | 6a · Vigorous |
| hrxHunsrikHunsrickisch | hrx | Indo-European | | | 7 · Shifting |
| huzHunzib | huz | Northeast Caucasian | | 1,000 | 6b · Threatened |
| jupHupHupdë | jup | Nadahup | | 1,700 | 5 · Developing |
| hupHupa | hup | Na-Dene | | 8 | 8b · Nearly Extinct |
| hapHuplabahasa Hupla | hap | — | | | 6b · Threatened |
| xhuHurrian | xhu | — | | | Extinct |
| gehHutterite German | geh | Indo-European | | 40,000 | |
| hwoHwana | hwo | Afroasiatic | | | 6a · Vigorous |
| hyaHya | hya | — | | | 8a · Moribund |
| jabHyam | jab | Niger–Congo | | 300,000 | 6a · Vigorous |