| wagWa'ema | wag | Austronesian | | | 6a · Vigorous |
| wwaWaama | wwa | Niger–Congo | | | 5 · Developing |
| ssnWaata | ssn | Afroasiatic | | 12,600 | 6a · Vigorous |
| wabWab | wab | Austronesian | | | 6b · Threatened |
| wbbWabo | wbb | Austronesian | | | 7 · Shifting |
| wciWaci | wci | Niger–Congo | | | 6a · Vigorous |
| xwdWadi Wadi | xwd | Australian Aboriginal languages | | | 9 · Dormant |
| kxpWadiyara | kxp | Indo-European | | | 6a · Vigorous |
| wrxWae Rana | wrx | Austronesian | | 3,000 | 6b · Threatened |
| wgbWagawaga | wgb | Austronesian | | | 6a · Vigorous |
| wgaWagaya | wga | Australian Aboriginal languages | | | 10 · Extinct |
| wdjWagaydy | wdj | Daly | | 5 | 8b · Nearly Extinct |
| wbrWagdi | wbr | — | | | 3 · Wider Communication |
| fadWagi | fad | Trans–New Guinea | | | 6b · Threatened |
| waqWagiman | waq | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| whkWahau Kenyahbahasa Kenyah Wahau | whk | Austronesian | | | 6b · Threatened |
| wgiWahgi | wgi | — | | | 5 · Developing |
| wbkWaigali | wbk | Indo-European | | 11,500 | 6a · Vigorous |
| wgoWaigeo | wgo | Austronesian | | | 7 · Shifting |
| wcaWaikáYąnomamɨ | wca | Yanomaman | | 6,000 | 6a · Vigorous |
| wlkWailaki | wlk | Na-Dene | | | 10 · Extinct |
| wlrWailapa | wlr | Austronesian | | | 6b · Threatened |
| rroWaima | rro | Austronesian | | | 5 · Developing |
| baoWaimahã | bao | Tucanoan | | 500 | 5 · Developing |
| atrWaimiri-Atroarí | atr | Cariban | | | 6a · Vigorous |
| wmhWaimoa | wmh | Austronesian | | | 6b · Threatened |
| wliWaioli | wli | West Papuan | | | 6b · Threatened |
| wawWaiwai | waw | — | | | 5 · Developing |
| wjaWaja | wja | — | | 60,000 | 6a · Vigorous |
| wbvWajarri | wbv | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| yuiWajiara | yui | Tucanoan | | 1,200 | 5 · Developing |
| xwjWajuk | xwj | Australian Aboriginal languages | | | 10 · Extinct |
| wavWaka | wav | — | | | 6a · Vigorous |
| wwbWakabunga | wwb | Australian Aboriginal languages | | | 10 · Extinct |
| aloWakasihu | alo | Austronesian | | | 6b · Threatened |
| wkwWakawaka | wkw | Australian Aboriginal languages | | | 9 · Dormant |
| wkdWakde | wkd | — | | | 7 · Shifting |
| wblWakhiښیکوار زیک | wbl | Indo-European | +1 | 23,681 | 6a · Vigorous |
| lglWala | lgl | Austronesian | | | 5 · Developing |
| wlwWalak | wlw | — | | | 6a · Vigorous |
| nlwWalangama | nlw | Australian Aboriginal languages | | | 10 · Extinct |
| wlxWali | wlx | Niger–Congo | | | 5 · Developing |
| wllWali language | wll | Nilo-Saharan | | | 6a · Vigorous |
| wlaWalio | wla | Walio | | | 6b · Threatened |
| waaWalla Walla | waa | Plateau Penutian | | | 8a · Moribund |
| wlsWallisianLea faka'uvea | wls | Austronesian | | | 5 · Developing |
| wlnWalloonwalon | wln | Indo-European | | 600,000 | 6b · Threatened |
| wmtWalmajarri | wmt | Australian Aboriginal languages | | | 7 · Shifting |
| waeWalser German | wae | — | +1 | 22,780 | 6b · Threatened |
| olaWalungge | ola | — | | | 6b · Threatened |
| wmcWamas | wmc | Trans–New Guinea | | | 6b · Threatened |
| wmbWambaya | wmb | Mirndi | | | 8a · Moribund |
| wmsWambon | wms | Trans–New Guinea | | | 6b · Threatened |
| wmeWambule | wme | Sino-Tibetan | | | 5 · Developing |
| couWamey | cou | Niger–Congo | | | 6b · Threatened |
| wmiWamin | wmi | Australian Aboriginal languages | | | 9 · Dormant |
| lbqWampar | lbq | Austronesian | | | 5 · Developing |
| wazWampur | waz | Austronesian | | | 6a · Vigorous |
| gvcWanano | gvc | Tucanoan | | 2,600 | 6b · Threatened |
| wnpWanap | wnp | Torricelli | | | 6b · Threatened |
| nnpWancho | nnp | Sino-Tibetan | | 59,154 | 5 · Developing |
| wbhWanda | wbh | Niger–Congo | | | 6b · Threatened |
| wadWandamen | wad | Austronesian | | | 6b · Threatened |
| lwgWanga | lwg | Niger–Congo | | | 4 · Educational |
| wnmWanggamala | wnm | Australian Aboriginal languages | | | 10 · Extinct |
| wggWangganguru | wgg | Australian Aboriginal languages | | 3 | 8b · Nearly Extinct |
| wngWanggom | wng | Trans–New Guinea | | | 6b · Threatened |
| xwkWangkumara | xwk | Australian Aboriginal languages | | | 10 · Extinct |
| kntWaninnawa | knt | Pano-Tacanan | | 700 | 6a · Vigorous |
| wbtWanman | wbt | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| wnoWano | wno | Trans–New Guinea | | 1,000 | 6b · Threatened |
| wncWantoat | wnc | Trans–New Guinea | | | 6a · Vigorous |
| wnkWanukaka | wnk | Austronesian | | | 6a · Vigorous |
| wnyWanyi | wny | Australian Aboriginal languages | | | 9 · Dormant |
| wddWanzi | wdd | Niger–Congo | | | 6a · Vigorous |
| aucWaorani | auc | — | | 1,650 | 6b · Threatened |
| jukWapan | juk | Niger–Congo | | | 5 · Developing |
| juwWãpha | juw | Niger–Congo | | | 6b · Threatened |
| wapWapishana | wap | Northern Maipuran | | 13,000 | 6b · Threatened |
| waoWappo | wao | — | | | 9 · Dormant |
| amlWar | aml | — | | | 6a · Vigorous |
| tciWára | tci | Morehead and Upper Maro River | | | 6a · Vigorous |
| wbaWarao | wba | — | | 28,100 | 6a · Vigorous |
| wraWarapu | wra | Skou | | | 6a · Vigorous |
| warWaray-WarayWaray-waray | war | Austronesian | | 3.1 m | 3 · Wider Communication |
| wrrWardaman | wrr | — | | | 8a · Moribund |
| gaeWarekena | gae | Northern Maipuran | | 650 | 8a · Moribund |
| wsaWarembori | wsa | Austronesian | | | 7 · Shifting |
| ouaWargli | oua | Afroasiatic | | 20,000 | 6b · Threatened |
| pavWari’ | pav | Chapacuran | | 1,930 | 6a · Vigorous |
| pnoWariapano | pno | Pano-Tacanan | | | 10 · Extinct |
| wrsWaris | wrs | Border | | | 4 · Educational |
| wbeWaritai | wbe | Lakes Plain | | | 6b · Threatened |
| wjiWarji | wji | — | | 77,700 | 6a · Vigorous |
| wrlWarlmanpa | wrl | — | | | 8b · Nearly Extinct |
| wbpWarlpiri | wbp | — | | 2,507 | 5 · Developing |
| wrbWarluwara | wrb | Australian Aboriginal languages | | | 10 · Extinct |
| wndWarndarang | wnd | Mangarrayi-Maran | | | 10 · Extinct |
| wrpWaropen | wrp | — | | | 7 · Shifting |
| wrzWarray | wrz | Australian Aboriginal languages | | | 10 · Extinct |
| wgyWarrgamay | wgy | Australian Aboriginal languages | | | 9 · Dormant |
| wrgWarrungu | wrg | Australian Aboriginal languages | | | 9 · Dormant |
| wwrWarrwa | wwr | Nyulnyulan | | | 10 · Extinct |
| wruWaru | wru | Austronesian | | | 6b · Threatened |
| wrmWarumungu | wrm | Australian Aboriginal languages | | 200 | 7 · Shifting |
| wrvWaruna | wrv | Trans–New Guinea | | | 6a · Vigorous |
| wssWasa | wss | Niger–Congo | | 273,000 | 5 · Developing |
| wacWasco-Wishram | wac | — | | | 9 · Dormant |
| wasWashowáꞏšiw ʔítlu | was | — | | 20 | 8b · Nearly Extinct |
| prnWasi-wari | prn | Indo-European | | 8,000 | 6a · Vigorous |
| wtkWatakataui | wtk | Sepik | | | 6b · Threatened |
| wthWathawurrung | wth | Australian Aboriginal languages | | | 10 · Extinct |
| wtfWatiwa | wtf | Trans–New Guinea | | | 6a · Vigorous |
| wahWatubela | wah | Austronesian | | | 6a · Vigorous |
| wauWaurá | wau | Paresi–Waura | | 320 | 5 · Developing |
| wuyWauyai | wuy | Austronesian | | | 7 · Shifting |
| wwwWawa | www | Niger–Congo | | | 6b · Threatened |
| wowWawonii | wow | Austronesian | | | 6a · Vigorous |
| wxaWaxiang Chinese | wxa | Sino-Tibetan | | | 6b · Threatened |
| oymWayampi | oym | Tupian | | | 5 · Developing |
| wayWayana | way | Cariban | | 1,700 | 5 · Developing |
| cttWayanad Chetti | ctt | Dravidian | | | 6b · Threatened |
| qvwWaylla Wanka | qvw | Quechua | | | 5 · Developing |
| wyrWayoró | wyr | Tupian | | | 8b · Nearly Extinct |
| gucWayuuWayuunaiki | guc | Ta-Arawakan | | 300,000 | 5 · Developing |
| wedWedau | wed | Austronesian | | | 5 · Developing |
| wehWeh | weh | — | | | 6a · Vigorous |
| wewWejewabahasa Sumba Barat | wew | Austronesian | | | 6a · Vigorous |
| wlhWelaun | wlh | Austronesian | | | |
| weuWelaung | weu | Sino-Tibetan | | | 6a · Vigorous |
| cymWelshCymraeg | cym | Indo-European | | 724,000 | 2 · Provincial |
| weoWemale | weo | Austronesian | | | 6a · Vigorous |
| xwwWemba Wemba | xww | Australian Aboriginal languages | | | 9 · Dormant |
| wdtWendat | wdt | Iroquoian | | | 9 · Dormant |
| weiWere | wei | Trans–New Guinea | | | 6a · Vigorous |
| wegWergaia | weg | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| werWeri | wer | Binanderean–Goilalan | | | 5 · Developing |
| wrnWerni | wrn | Niger–Congo | | | 6b · Threatened |
| kvwWersing | kvw | Trans–New Guinea | | | 6a · Vigorous |
| nndWest Ambae | nnd | Austronesian | | | 5 · Developing |
| bbpWest Banda | bbp | Niger–Congo | | | 6a · Vigorous |
| wbsWest Bengal Sign Language | wbs | — | | | 6a · Vigorous |
| zbwWest Berawan | zbw | Austronesian | | | 6b · Threatened |
| bdrWest Coast Bajauling Sama | bdr | Austronesian | | 210,000 | 6b · Threatened |
| drnWest Damarbahasa Damar Barat | drn | — | | 800 | 6b · Threatened |
| vlsWest FlemishWest-Vlams | vls | Indo-European | | 1.4 m | 6b · Threatened |
| fryWest FrisianFrysk | fry | Indo-European | | 845,100 | Vulnerable |
| kewWest Kewa | kew | Trans–New Guinea | | | 5 · Developing |
| mqsWest Makian | mqs | West Papuan | | 12,000 | 6a · Vigorous |
| txnWest Taranganbahasa Tarangan Barat | txn | Austronesian | | 7,910 | 5 · Developing |
| uveWest Uvean | uve | Austronesian | | 2,200 | 6b · Threatened |
| abeWestern AbnakiAlnôbak | abe | Algic | | 14 | 8b · Nearly Extinct |
| apwWestern Apache | apw | Na-Dene | | 13,445 | 6b · Threatened |
| hywWestern Armenianարեւմտահայերէն | hyw | Indo-European | +1 | 1.4 m | 5 · Developing |
| areWestern Arrarnta | are | Australian Aboriginal languages | | | 5 · Developing |
| bgnWestern Balochi | bgn | — | | | 5 · Developing |
| gnwWestern Bolivian Guaraní | gnw | Tupian | | 7,000 | 6a · Vigorous |
| brvWestern Bru | brv | Austroasiatic | | | 6a · Vigorous |
| mbbWestern Bukidnon Manobo | mbb | Austronesian | | 15,000 | 5 · Developing |
| cjaWestern Cham | cja | Austronesian | | | 6a · Vigorous |
| dnwWestern Danibahasa Dani Barat | dnw | Trans–New Guinea | | 180,000 | 6a · Vigorous |
| wyyWestern Fijian | wyy | Austronesian | | 5,000 | 6a · Vigorous |
| puaWestern Highland Purepecha | pua | — | | 140,000 | 5 · Developing |
| kyuWestern Kayah | kyu | — | | 150,000 | 5 · Developing |
| kjqWestern Keres | kjq | — | | | 7 · Shifting |
| lcpWestern Lawa | lcp | Austroasiatic | | | 5 · Developing |
| mrdWestern Magar | mrd | — | | | 6b · Threatened |
| hmwWestern Mashan Hmong | hmw | Hmong–Mien | | | 6b · Threatened |
| rafWestern Meohang | raf | Sino-Tibetan | | | 6b · Threatened |
| amwWestern Neo-Aramaic | amw | Afroasiatic | | | 7 · Shifting |
| ojwWestern Ojibwa | ojw | Algic | | 10,000 | 6b · Threatened |
| levWestern Pantarbahasa Lamma | lev | Trans–New Guinea | | | 6a · Vigorous |
| kjlWestern Parbate Kham | kjl | Sino-Tibetan | | | 5 · Developing |
| pneWestern Penan | pne | Austronesian | | | 6b · Threatened |
| pwoWestern Pwo | pwo | Sino-Tibetan | | | 6b · Threatened |
| sucWestern Subanon | suc | Austronesian | | | 5 · Developing |
| tdgWestern Tamang | tdg | Bodish | | | 6a · Vigorous |
| twbWestern Tawbuid | twb | Austronesian | | | 5 · Developing |
| tnbWestern Tunebo | tnb | Chibchan | | | 6a · Vigorous |
| wecWestern Wee | wec | Niger–Congo | | | 5 · Developing |
| xwlWestern Xwla | xwl | Niger–Congo | | | 6a · Vigorous |
| ybeWestern Yugur | ybe | Turkic | | 4,600 | 8a · Moribund |
| wepWestphalian | wep | Indo-European | | | 6a · Vigorous |
| weaWewaw | wea | Sino-Tibetan | | | 10 · Extinct |
| woyWeyto | woy | — | | | 9 · Dormant |
| giwWhite Gelao | giw | Kra–Dai | | | 8b · Nearly Extinct |
| lwhWhite Lachi | lwh | Kra–Dai | | | 7 · Shifting |
| tnpWhitesands | tnp | Austronesian | | 7,500 | 7 · Shifting |
| tuaWiarumus | tua | Torricelli | | | 8b · Nearly Extinct |
| wicWichita | wic | Caddoan | | | 9 · Dormant |
| wihWik-Me'anha | wih | Australian Aboriginal languages | | | 8a · Moribund |
| wimWik-Mungkan | wim | Australian Aboriginal languages | | | 6b · Threatened |
| wigWik-Ngathan | wig | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| wikWik-Ngatharr | wik | Australian Aboriginal languages | | | 7 · Shifting |
| wuaWikngenchera | wua | Australian Aboriginal languages | | | 8a · Moribund |
| winWinnebago | win | Hoka-Sioux | | | 8a · Moribund |
| wnwWintu | wnw | Wintuan | | 5 | 10 · Extinct |
| gdrWipi | gdr | Eastern Trans-Fly | | | 5 · Developing |
| wrhWiradjuri | wrh | Australian Aboriginal languages | | 30 | 8b · Nearly Extinct |
| wguWirangu | wgu | Australian Aboriginal languages | | | 9 · Dormant |
| wiuWiru | wiu | — | | | 5 · Developing |
| mbpWiwa | mbp | Chibchan | | 1,850 | 6a · Vigorous |
| wiyWiyot | wiy | Algic | | | 9 · Dormant |
| wogWogamusin | wog | Sepik | | | 6a · Vigorous |
| wocWogeo | woc | Austronesian | | | 6a · Vigorous |
| wbwWoi | wbw | Austronesian | | | 6b · Threatened |
| woiWoisikabahasa Woisika | woi | Trans–New Guinea | | | 6a · Vigorous |
| wyiWoiwurrung | wyi | Australian Aboriginal languages | | | 9 · Dormant |
| wodWolani | wod | — | | | 5 · Developing |
| walWolaytta | wal | Afroasiatic | | 5.8 m | 3 · Wider Communication |
| woeWoleaiankapetali Weleya | woe | Austronesian | | 1,700 | 6a · Vigorous |
| wloWolio | wlo | Austronesian | | 65,000 | 6b · Threatened |
| wolWolof | wol | Niger–Congo | | 3.7 m | 4 · Educational |
| womWom | wom | Niger–Congo | | | 6a · Vigorous |
| wmoWom | wmo | Torricelli | | | 7 · Shifting |
| wonWongo | won | Niger–Congo | | | 6a · Vigorous |
| cwdWoods Cree | cwd | — | | | 6b · Threatened |
| worWoria | wor | Geelvink Bay | | | 8b · Nearly Extinct |
| kdaWorimi | kda | Australian Aboriginal languages | | | 9 · Dormant |
| wroWorora | wro | Worrorran | | | 8b · Nearly Extinct |
| wsvWotapuri-Katarqalai | wsv | — | | | 9 · Dormant |
| xwtWotjobaluk | xwt | Australian Aboriginal languages | | | 10 · Extinct |
| wtwWotubahasa Wotu | wtw | Austronesian | | | 7 · Shifting |
| noaWounaan | noa | Choco | | | 5 · Developing |
| bbxWovea | bbx | Niger–Congo | | | 6b · Threatened |
| wuuWu Chinese吴语 | wuu | Sino-Tibetan | | 80.7 m | 5 · Developing |
| wluWuliwuli | wlu | Australian Aboriginal languages | | | 10 · Extinct |
| wuxWulna | wux | — | | | 10 · Extinct |
| bqmWumboko | bqm | Niger–Congo | | | 6b · Threatened |
| wumWumbvu | wum | Niger–Congo | | | 6a · Vigorous |
| ywuWumeng Nasu | ywu | — | | | 6b · Threatened |
| wubWunambal | wub | Worrorran | | | 8b · Nearly Extinct |
| yigWusa Nasu | yig | Sino-Tibetan | | | 5 · Developing |
| bseWushi | bse | Niger–Congo | | | 6a · Vigorous |
| wsiWusi | wsi | — | | | 6b · Threatened |
| wuhWutunNgandehua | wuh | Sino-Tibetan | | 4,000 | 6a · Vigorous |
| wutWutung | wut | Skou | | 900 | 6a · Vigorous |
| wuvWuvulu-Aua | wuv | Austronesian | | | 5 · Developing |
| udlWuzlam | udl | Afroasiatic | | | 5 · Developing |
| wynWyandot | wyn | Iroquoian | | | |
| wyaWyandot | wya | Iroquoian | | | 9 · Reawakening |
| wymWymysorysWymysiöeryś | wym | Indo-European | | 70 | 8a · Moribund |