| baa | Babatana |
| bab | Bainouk-Gunyuño |
| bac | Badui |
| bae | Baré |
| baf | Nubaca |
| bag | Tuki |
| bah | Bahamas Creole English |
| baj | Barakai |
| bak | Bashkir |
| bal | Baluchi |
| bam | Bambara |
| ban | Balinese |
| bao | Waimaha |
| bap | Bantawa |
| bar | Bavarian |
| bas | Basa (Cameroon) |
| bau | Bada (Nigeria) |
| bav | Vengo |
| baw | Bambili-Bambui |
| bax | Bamun |
| bay | Batuley |
| bba | Baatonum |
| bbb | Barai |
| bbc | Batak Toba |
| bbd | Bau |
| bbe | Bangba |
| bbf | Baibai |
| bbg | Barama |
| bbh | Bugan |
| bbi | Barombi |
| bbj | Ghomálá' |
| bbk | Babanki |
| bbl | Bats |
| bbm | Babango |
| bbn | Uneapa |
| bbo | Konabéré |
| bbo | Northern Bobo Madaré |
| bbp | West Central Banda |
| bbq | Bamali |
| bbr | Girawa |
| bbs | Bakpinka |
| bbt | Mburku |
| bbu | Kulung (Nigeria) |
| bbv | Karnai |
| bbw | Baba |
| bbx | Bubia |
| bby | Befang |
| bbz | Babalia Creole Arabic |
| bca | Central Bai |
| bcb | Bainouk-Samik |
| bcc | Southern Balochi |
| bcd | North Babar |
| bce | Bamenyam |
| bcf | Bamu |
| bcg | Baga Binari |
| bch | Bariai |
| bci | Baoulé |
| bcj | Bardi |
| bck | Bunaba |
| bcl | Central Bikol |
| bcm | Bannoni |
| bcn | Bali (Nigeria) |
| bco | Kaluli |
| bcp | Bali (Democratic Republic of Congo) |
| bcq | Bench |
| bcr | Babine |
| bcs | Kohumono |
| bct | Bendi |
| bcu | Awad Bing |
| bcv | Shoo-Minda-Nye |
| bcw | Bana |
| bcy | Bacama |
| bcz | Bainouk-Gunyaamolo |
| bda | Bayot |
| bdb | Basap |
| bdc | Emberá-Baudó |
| bdd | Bunama |
| bde | Bade |
| bdf | Biage |
| bdg | Bonggi |
| bdh | Baka (Sudan) |
| bdi | Burun |
| bdj | Bai |
| bdk | Budukh |
| bdl | Indonesian Bajau |
| bdm | Buduma |
| bdn | Baldemu |
| bdo | Morom |
| bdp | Bende |
| bdq | Bahnar |
| bdr | West Coast Bajau |
| bds | Burunge |
| bdt | Bokoto |
| bdu | Oroko |
| bdv | Bodo Parja |
| bdw | Baham |
| bdx | Budong-Budong |
| bdy | Bandjalang |
| bdz | Badeshi |
| bea | Beaver |
| beb | Bebele |
| bec | Iceve-Maci |
| bed | Bedoanas |
| bee | Byangsi |
| bef | Benabena |
| beg | Belait |
| beh | Biali |
| bei | Bekati' |
| bej | Bedawiyet |
| bej | Beja |
| bek | Bebeli |
| bel | Belarusian |
| bem | Bemba (Zambia) |
| ben | Bengali |
| beo | Beami |
| bep | Besoa |
| beq | Beembe |
| bes | Besme |
| bet | Guiberoua Béte |
| beu | Blagar |
| bev | Daloa Bété |
| bew | Betawi |
| bex | Jur Modo |
| bey | Beli (Papua New Guinea) |
| bez | Bena (Tanzania) |
| bfa | Bari |
| bfb | Pauri Bareli |
| bfc | Northern Bai |
| bfc | Panyi Bai |
| bfd | Bafut |
| bfe | Betaf |
| bfe | Tena |
| bff | Bofi |
| bfg | Busang Kayan |
| bfh | Blafe |
| bfi | British Sign Language |
| bfj | Bafanji |
| bfk | Ban Khor Sign Language |
| bfl | Banda-Ndélé |
| bfm | Mmen |
| bfn | Bunak |
| bfo | Malba Birifor |
| bfp | Beba |
| bfq | Badaga |
| bfr | Bazigar |
| bfs | Southern Bai |
| bft | Balti |
| bfu | Gahri |
| bfw | Bondo |
| bfx | Bantayanon |
| bfy | Bagheli |
| bfz | Mahasu Pahari |
| bga | Gwamhi-Wuri |
| bgb | Bobongko |
| bgc | Haryanvi |
| bgd | Rathwi Bareli |
| bge | Bauria |
| bgf | Bangandu |
| bgg | Bugun |
| bgi | Giangan |
| bgj | Bangolan |
| bgk | Bit |
| bgk | Buxinhua |
| bgl | Bo (Laos) |
| bgm | Baga Mboteni |
| bgn | Western Balochi |
| bgo | Baga Koga |
| bgp | Eastern Balochi |
| bgq | Bagri |
| bgr | Bawm Chin |
| bgs | Tagabawa |
| bgt | Bughotu |
| bgu | Mbongno |
| bgv | Warkay-Bipim |
| bgw | Bhatri |
| bgx | Balkan Gagauz Turkish |
| bgy | Benggoi |
| bgz | Banggai |
| bha | Bharia |
| bhb | Bhili |
| bhc | Biga |
| bhd | Bhadrawahi |
| bhe | Bhaya |
| bhf | Odiai |
| bhg | Binandere |
| bhh | Bukharic |
| bhi | Bhilali |
| bhj | Bahing |
| bhl | Bimin |
| bhm | Bathari |
| bhn | Bohtan Neo-Aramaic |
| bho | Bhojpuri |
| bhp | Bima |
| bhq | Tukang Besi South |
| bhr | Bara Malagasy |
| bhs | Buwal |
| bht | Bhattiyali |
| bhu | Bhunjia |
| bhv | Bahau |
| bhw | Biak |
| bhx | Bhalay |
| bhy | Bhele |
| bhz | Bada (Indonesia) |
| bia | Badimaya |
| bib | Bisa |
| bib | Bissa |
| bic | Bikaru |
| bid | Bidiyo |
| bie | Bepour |
| bif | Biafada |
| big | Biangai |
| bij | Vaghat-Ya-Bijim-Legeri |
| bik | Bikol |
| bil | Bile |
| bim | Bimoba |
| bin | Bini |
| bin | Edo |
| bio | Nai |
| bip | Bila |
| biq | Bipi |
| bir | Bisorio |
| bis | Bislama |
| bit | Berinomo |
| biu | Biete |
| biv | Southern Birifor |
| biw | Kol (Cameroon) |
| bix | Bijori |
| biy | Birhor |
| biz | Baloi |
| bja | Budza |
| bjb | Banggarla |
| bjc | Bariji |
| bje | Biao-Jiao Mien |
| bjf | Barzani Jewish Neo-Aramaic |
| bjg | Bidyogo |
| bjh | Bahinemo |
| bji | Burji |
| bjj | Kanauji |
| bjk | Barok |
| bjl | Bulu (Papua New Guinea) |
| bjm | Bajelani |
| bjn | Banjar |
| bjo | Mid-Southern Banda |
| bjp | Fanamaket |
| bjr | Binumarien |
| bjs | Bajan |
| bjt | Balanta-Ganja |
| bju | Busuu |
| bjv | Bedjond |
| bjw | Bakwé |
| bjx | Banao Itneg |
| bjy | Bayali |
| bjz | Baruga |
| bka | Kyak |
| bkc | Baka (Cameroon) |
| bkd | Binukid |
| bkd | Talaandig |
| bkf | Beeke |
| bkg | Buraka |
| bkh | Bakoko |
| bki | Baki |
| bkj | Pande |
| bkk | Brokskat |
| bkl | Berik |
| bkm | Kom (Cameroon) |
| bkn | Bukitan |
| bko | Kwa' |
| bkp | Boko (Democratic Republic of Congo) |
| bkq | Bakairí |
| bkr | Bakumpai |
| bks | Northern Sorsoganon |
| bkt | Boloki |
| bku | Buhid |
| bkv | Bekwarra |
| bkw | Bekwel |
| bkx | Baikeno |
| bky | Bokyi |
| bkz | Bungku |
| bla | Siksika |
| blb | Bilua |
| blc | Bella Coola |
| bld | Bolango |
| ble | Balanta-Kentohe |
| blf | Buol |
| blg | Balau |
| blh | Kuwaa |
| bli | Bolia |
| blj | Bolongan |
| blk | Pa'O |
| blk | Pa'o Karen |
| bll | Biloxi |
| blm | Beli (Sudan) |
| bln | Southern Catanduanes Bikol |
| blo | Anii |
| blp | Blablanga |
| blq | Baluan-Pam |
| blr | Blang |
| bls | Balaesang |
| blt | Tai Dam |
| blv | Bolo |
| blw | Balangao |
| blx | Mag-Indi Ayta |
| bly | Notre |
| blz | Balantak |
| bma | Lame |
| bmb | Bembe |
| bmc | Biem |
| bmd | Baga Manduri |
| bme | Limassa |
| bmf | Bom |
| bmg | Bamwe |
| bmh | Kein |
| bmi | Bagirmi |
| bmj | Bote-Majhi |
| bmk | Ghayavi |
| bml | Bomboli |
| bmm | Northern Betsimisaraka Malagasy |
| bmn | Bina (Papua New Guinea) |
| bmo | Bambalang |
| bmp | Bulgebi |
| bmq | Bomu |
| bmr | Muinane |
| bms | Bilma Kanuri |
| bmt | Biao Mon |
| bmu | Somba-Siawari |
| bmv | Bum |
| bmw | Bomwali |
| bmx | Baimak |
| bmz | Baramu |
| bna | Bonerate |
| bnb | Bookan |
| bnc | Bontok |
| bnd | Banda (Indonesia) |
| bne | Bintauna |
| bnf | Masiwang |
| bng | Benga |
| bni | Bangi |
| bnj | Eastern Tawbuid |
| bnk | Bierebo |
| bnl | Boon |
| bnm | Batanga |
| bnn | Bunun |
| bno | Bantoanon |
| bnp | Bola |
| bnq | Bantik |
| bnr | Butmas-Tur |
| bns | Bundeli |
| bnu | Bentong |
| bnv | Beneraf |
| bnv | Bonerif |
| bnv | Edwas |
| bnw | Bisis |
| bnx | Bangubangu |
| bny | Bintulu |
| bnz | Beezen |
| boa | Bora |
| bob | Aweer |
| bod | Tibetan |
| boe | Mundabli |
| bof | Bolon |
| bog | Bamako Sign Language |
| boh | Boma |
| boi | Barbareño |
| boj | Anjam |
| bok | Bonjo |
| bol | Bole |
| bom | Berom |
| bon | Bine |
| boo | Tiemacèwè Bozo |
| bop | Bonkiman |
| boq | Bogaya |
| bor | Borôro |
| bos | Bosnian |
| bot | Bongo |
| bou | Bondei |
| bov | Tuwuli |
| bow | Rema |
| box | Buamu |
| boy | Bodo (Central African Republic) |
| boz | Tiéyaxo Bozo |
| bpa | Daakaka |
| bpb | Barbacoas |
| bpd | Banda-Banda |
| bpg | Bonggo |
| bph | Botlikh |
| bpi | Bagupi |
| bpj | Binji |
| bpk | 'Ôrôê |
| bpk | Orowe |
| bpl | Broome Pearling Lugger Pidgin |
| bpm | Biyom |
| bpn | Dzao Min |
| bpo | Anasi |
| bpp | Kaure |
| bpq | Banda Malay |
| bpr | Koronadal Blaan |
| bps | Sarangani Blaan |
| bpt | Barrow Point |
| bpu | Bongu |
| bpv | Bian Marind |
| bpw | Bo (Papua New Guinea) |
| bpx | Palya Bareli |
| bpy | Bishnupriya |
| bpz | Bilba |
| bqa | Tchumbuli |
| bqb | Bagusa |
| bqc | Boko (Benin) |
| bqc | Boo |
| bqd | Bung |
| bqf | Baga Kaloum |
| bqg | Bago-Kusuntu |
| bqh | Baima |
| bqi | Bakhtiari |
| bqj | Bandial |
| bqk | Banda-Mbrès |
| bql | Bilakura |
| bqm | Wumboko |
| bqn | Bulgarian Sign Language |
| bqo | Balo |
| bqp | Busa |
| bqq | Biritai |
| bqr | Burusu |
| bqs | Bosngun |
| bqt | Bamukumbit |
| bqu | Boguru |
| bqv | Begbere-Ejar |
| bqv | Koro Wachi |
| bqw | Buru (Nigeria) |
| bqx | Baangi |
| bqy | Bengkala Sign Language |
| bqz | Bakaka |
| bra | Braj |
| brb | Lave |
| brc | Berbice Creole Dutch |
| brd | Baraamu |
| bre | Breton |
| brf | Bera |
| brg | Baure |
| brh | Brahui |
| bri | Mokpwe |
| brj | Bieria |
| brk | Birked |
| brl | Birwa |
| brm | Barambu |
| brn | Boruca |
| bro | Brokkat |
| brp | Barapasi |
| brq | Breri |
| brr | Birao |
| brs | Baras |
| brt | Bitare |
| bru | Eastern Bru |
| brv | Western Bru |
| brw | Bellari |
| brx | Bodo (India) |
| bry | Burui |
| brz | Bilbil |
| bsa | Abinomn |
| bsb | Brunei Bisaya |
| bsc | Bassari |
| bsc | Oniyan |
| bse | Wushi |
| bsf | Bauchi |
| bsg | Bashkardi |
| bsh | Kati |
| bsi | Bassossi |
| bsj | Bangwinji |
| bsk | Burushaski |
| bsl | Basa-Gumna |
| bsm | Busami |
| bsn | Barasana-Eduria |
| bso | Buso |
| bsp | Baga Sitemu |
| bsq | Bassa |
| bsr | Bassa-Kontagora |
| bss | Akoose |
| bst | Basketo |
| bsu | Bahonsuai |
| bsv | Baga Sobané |
| bsw | Baiso |
| bsx | Yangkam |
| bsy | Sabah Bisaya |
| bta | Bata |
| btc | Bati (Cameroon) |
| btd | Batak Dairi |
| bte | Gamo-Ningi |
| btf | Birgit |
| btg | Gagnoa Bété |
| bth | Biatah Bidayuh |
| bti | Burate |
| btj | Bacanese Malay |
| btl | Bhatola |
| btm | Batak Mandailing |
| btn | Ratagnon |
| bto | Rinconada Bikol |
| btp | Budibud |
| btq | Batek |
| btr | Baetora |
| bts | Batak Simalungun |
| btt | Bete-Bendi |
| btu | Batu |
| btv | Bateri |
| btw | Butuanon |
| btx | Batak Karo |
| bty | Bobot |
| btz | Batak Alas-Kluet |
| bua | Buriat |
| bub | Bua |
| buc | Bushi |
| bud | Ntcham |
| bue | Beothuk |
| buf | Bushoong |
| bug | Buginese |
| buh | Younuo Bunu |
| bui | Bongili |
| buj | Basa-Gurmana |
| buk | Bugawac |
| bul | Bulgarian |
| bum | Bulu (Cameroon) |
| bun | Sherbro |
| buo | Terei |
| bup | Busoa |
| buq | Brem |
| bus | Bokobaru |
| but | Bungain |
| buu | Budu |
| buv | Bun |
| buw | Bubi |
| bux | Boghom |
| buy | Bullom So |
| buz | Bukwen |
| bva | Barein |
| bvb | Bube |
| bvc | Baelelea |
| bvd | Baeggu |
| bve | Berau Malay |
| bvf | Boor |
| bvg | Bonkeng |
| bvh | Bure |
| bvi | Belanda Viri |
| bvj | Baan |
| bvk | Bukat |
| bvl | Bolivian Sign Language |
| bvm | Bamunka |
| bvn | Buna |
| bvo | Bolgo |
| bvp | Bumang |
| bvq | Birri |
| bvr | Burarra |
| bvt | Bati (Indonesia) |
| bvu | Bukit Malay |
| bvv | Baniva |
| bvw | Boga |
| bvx | Dibole |
| bvy | Baybayanon |
| bvz | Bauzi |
| bwa | Bwatoo |
| bwb | Namosi-Naitasiri-Serua |
| bwc | Bwile |
| bwd | Bwaidoka |
| bwe | Bwe Karen |
| bwf | Boselewa |
| bwg | Barwe |
| bwh | Bishuo |
| bwi | Baniwa |
| bwj | Láá Láá Bwamu |
| bwk | Bauwaki |
| bwl | Bwela |
| bwm | Biwat |
| bwn | Wunai Bunu |
| bwo | Borna (Ethiopia) |
| bwo | Boro (Ethiopia) |
| bwp | Mandobo Bawah |
| bwq | Southern Bobo Madaré |
| bwr | Bura-Pabir |
| bws | Bomboma |
| bwt | Bafaw-Balong |
| bwu | Buli (Ghana) |
| bww | Bwa |
| bwx | Bu-Nao Bunu |
| bwy | Cwi Bwamu |
| bwz | Bwisi |
| bxa | Tairaha |
| bxb | Belanda Bor |
| bxc | Molengue |
| bxd | Pela |
| bxe | Birale |
| bxf | Bilur |
| bxf | Minigir |
| bxg | Bangala |
| bxh | Buhutu |
| bxi | Pirlatapa |
| bxj | Bayungu |
| bxk | Bukusu |
| bxk | Lubukusu |
| bxl | Jalkunan |
| bxm | Mongolia Buriat |
| bxn | Burduna |
| bxo | Barikanchi |
| bxp | Bebil |
| bxq | Beele |
| bxr | Russia Buriat |
| bxs | Busam |
| bxu | China Buriat |
| bxv | Berakou |
| bxw | Bankagooma |
| bxz | Binahari |
| bya | Batak |
| byb | Bikya |
| byc | Ubaghara |
| byd | Benyadu' |
| bye | Pouye |
| byf | Bete |
| byg | Baygo |
| byh | Bhujel |
| byi | Buyu |
| byj | Bina (Nigeria) |
| byk | Biao |
| byl | Bayono |
| bym | Bidyara |
| byn | Bilin |
| byn | Blin |
| byo | Biyo |
| byp | Bumaji |
| byq | Basay |
| byr | Baruya |
| byr | Yipma |
| bys | Burak |
| byt | Berti |
| byv | Medumba |
| byw | Belhariya |
| byx | Qaqet |
| byz | Banaro |
| bza | Bandi |
| bzb | Andio |
| bzc | Southern Betsimisaraka Malagasy |
| bzd | Bribri |
| bze | Jenaama Bozo |
| bzf | Boikin |
| bzg | Babuza |
| bzh | Mapos Buang |
| bzi | Bisu |
| bzj | Belize Kriol English |
| bzk | Nicaragua Creole English |
| bzl | Boano (Sulawesi) |
| bzm | Bolondo |
| bzn | Boano (Maluku) |
| bzo | Bozaba |
| bzp | Kemberano |
| bzq | Buli (Indonesia) |
| bzr | Biri |
| bzs | Brazilian Sign Language |
| bzt | Brithenig |
| bzu | Burmeso |
| bzv | Naami |
| bzw | Basa (Nigeria) |
| bzx | Kɛlɛngaxo Bozo |
| bzy | Obanliku |
| bzz | Evant |