# ISO 639:b

This is a list of ISO 639-3 language codes starting with B.
Index | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | w | x | y | z
Abbreviations are used in the table as follows:
* Scope (Archived April 21, 2006, at the Wayback Machine. Additional archives: December 15, 2023.): I = individual language, M = macrolanguage, S = special code
* Type (Archived April 21, 2006, at the Wayback Machine. Additional archives: December 14, 2023.): A = ancient (extinct since ancient times), C = constructed, E = extinct (in recent times), H = historical (distinct from its modern form), L = living, S = special code
Retired codes are enclosed in (parentheses).
The column Family contains the generic English name of the language's family or macrolanguage.
| ISO 639 codes | ISO 639 codes | ISO 639 codes | Scope/Type | Family | Language names | Language names | Language names | Language names | Language names | Language names | Language names |
| 639-3 | 639-1 | 639-2B | Scope/Type | Family | Native | eng | fra | spa | zho | rus | deu |
| baa | | | I/L | Austronesian | | Babatana | | | | | |
| bab | | | I/L | Niger-Congo | | Bainouk-Gunyuño | | | | | |
| bac | | | I/L | Austronesian | | Badui | badui | | | | |
| bae | | | I/E | Arawakan | | Baré | baré | | | | |
| baf | | | I/L | Niger-Congo | | Nubaca | | | | | |
| bag | | | I/L | Niger-Congo | | Tuki | | | | | |
| bah | | | I/L | English Creole | | Bahamas Creole English | créole anglais bahaméen | | 巴哈马克里奥尔英语 | багамский креольский английский | |
| baj | | | I/L | Austronesian | | Barakai | | | | | |
| bak | ba | bak | I/L | Turkic | башҡорт | Bashkir | bachkir | baskir | 巴什基尔语 | башкирский | Baschkirisch |
| bal | | bal | M/L | Indo-European | بلوچی | Baluchi | baloutchi | | 俾路支语 | белуджский | |
| bam | bm | bam | I/L | Niger–Congo | bamanankan | Bambara | bambara | | 班巴拉语 | бамана | |
| ban | | ban | I/L | Austronesian | Basa Bali | Balinese | balinais | balinés | 巴厘语; 峇里语 | балийский | Balinesisch |
| bao | | | I/L | Tucanoan | | Waimaha | | | | | |
| bap | | | I/L | Sino-Tibetan | | Bantawa | | | | | |
| bar | | | I/L | Indo-European | | Bavarian | bavarois | bávaro | 巴伐利亚语 | баварский | Bairisch |
| bas | | bas | I/L | Niger-Congo | ɓasaá | Basa (Cameroon) | basa | | 巴萨语 | баса | |
| bau | | | I/L | Niger-Congo | | Bada (Nigeria) | | | | | |
| bav | | | I/L | Niger-Congo | | Vengo | vengo | | | | |
| baw | | | I/L | Niger-Congo | | Bambili-Bambui | | | | | |
| bax | | | I/L | Niger-Congo | | Bamun | bamoun | | | | |
| bay | | | I/L | Austronesian | | Batuley | | | | | |
| (baz) | | | I/L | Niger-Congo | | Tunen | | | | | |
| bba | | | I/L | Niger-Congo | | Baatonum | | | | | |
| bbb | | | I/L | Trans-New Guinea | | Barai | baraï | | | | |
| bbc | | | I/L | Austronesian | | Batak Toba | | | | батак тоба | |
| bbd | | | I/L | Trans-New Guinea | | Bau | | | | | |
| bbe | | | I/L | Niger-Congo | | Bangba | | | | | |
| bbf | | | I/L | Fas | | Baibai | | | | | |
| bbg | | | I/L | Niger-Congo | | Barama | | | | | |
| bbh | | | I/L | Austroasiatic | | Bugan | | | 布甘语 | | |
| bbi | | | I/L | Niger-Congo | | Barombi | | | | | |
| bbj | | | I/L | Niger-Congo | | Ghomálá' | | | | | |
| bbk | | | I/L | Niger-Congo | | Babanki | | | | | |
| bbl | | | I/L | Northeast Caucasian | | Bats | | bácico | 巴茨语 | | |
| bbm | | | I/L | Niger-Congo | | Babango | | | | | |
| bbn | | | I/L | Austronesian | | Uneapa | | | | | |
| bbo | | | I/L | Niger-Congo | | Bobo Madaré, Northern | | | | | |
| bbp | | | I/L | Niger-Congo | | Banda, West Central | | | | | |
| bbq | | | I/L | Niger-Congo | | Bamali | | | | | |
| bbr | | | I/L | Trans-New Guinea | | Girawa | | | | | |
| bbs | | | I/L | Niger-Congo | | Bakpinka | | | | | |
| bbt | | | I/L | Afro-Asiatic | | Mburku | | | | | |
| bbu | | | I/L | Niger-Congo | | Kulung (Nigeria) | | | | | |
| bbv | | | I/L | Austronesian | | Karnai | | | | | |
| bbw | | | I/L | Niger-Congo | | Baba | | | | | |
| bbx | | | I/L | Niger-Congo | | Bubia | | | | | |
| bby | | | I/L | Niger-Congo | | Befang | | | | | |
| (bbz) | | | I/L | Creole | | Arabic, Babalia Creole | créole arabe babalia | | | бабалийский креольский арабский | |
| bca | | | I/L | Sino-Tibetan | | Bai, Central | | | 剑川白语 | | |
| bcb | | | I/L | Niger-Congo | | Bainouk-Samik | | | | | |
| bcc | | | I/L | Indo-European | بلوچی | Balochi, Southern | | | 南俾路支语 | белуджский южный | |
| bcd | | | I/L | Austronesian | | Babar, North | babar (du Nord) | | | | |
| bce | | | I/L | Niger-Congo | | Bamenyam | | | | | |
| bcf | | | I/L | Kiwaian | | Bamu | | | | | |
| bcg | | | I/L | Niger-Congo | | Baga Binari | | | | | |
| bch | | | I/L | Austronesian | | Bariai | | | | | |
| bci | | | I/L | Niger-Congo | | Baoulé | Baoulé | | | | |
| bcj | | | I/L | Nyulnyulan | | Bardi | | | | | |
| bck | | | I/L | Bunuban | | Bunaba | | | | | |
| bcl | | | I/L | Austronesian | | Bicolano, Central | | | 中比科尔语 | нага-бикольский (центральный биколано) | |
| bcm | | | I/L | Austronesian | | Bannoni | | | | баннони | |
| bcn | | | I/L | Niger-Congo | | Bali (Nigeria) | bali (nigérian) | | | | |
| bco | | | I/L | Trans-New Guinea | | Kaluli | | | | | |
| bcp | | | I/L | Niger-Congo | | Bali (Democratic Republic of Congo) | bali (République démocratique du Congo | | | | |
| bcq | | | I/L | Afro-Asiatic | | Bench | | | | | |
| bcr | | | I/L | Na-Dené | Witsuwit'en | Babine | | | | бабин-вицувитен (северный кэрриер, бабин) | |
| bcs | | | I/L | Niger-Congo | | Kohumono | | | | | |
| bct | | | I/L | Nilo-Saharan | | Bendi | | | | | |
| bcu | | | I/L | Austronesian | | Awad Bing | | | | | |
| bcv | | | I/L | Niger-Congo | | Shoo-Minda-Nye | | | | | |
| bcw | | | I/L | Afro-Asiatic | | Bana | | | | | |
| (bcx) | | | I/L | Austronesian | | Pamona | | | | | |
| bcy | | | I/L | Afro-Asiatic | | Bacama | | | | | |
| bcz | | | I/L | Niger-Congo | | Bainouk-Gunyaamolo | | | | | |
| bda | | | I/L | Niger-Congo | | Bayot | | | | | |
| bdb | | | I/L | Austronesian | | Basap | | | | | |
| bdc | | | I/L | Chocoan | | Emberá-Baudó | | | | | |
| bdd | | | I/L | Austronesian | | Bunama | | | | | |
| bde | | | I/L | Afro-Asiatic | | Bade | | | | | |
| bdf | | | I/L | Trans-New Guinea | | Biage | | | | | |
| bdg | | | I/L | Austronesian | | Bonggi | | | | | |
| bdh | | | I/L | Nilo-Saharan | | Baka (Sudan) | | | | | |
| bdi | | | I/L | Nilo-Saharan | | Burun | | | | | |
| bdj | | | I/L | Niger-Congo | Bairt⤧ngvrt⤧zix | Bai | baï | | | | |
| bdk | | | I/L | Northeast Caucasian | | Budukh | boudoukh | budukh | | | Buduchisch |
| bdl | | | I/L | Austronesian | | Bajau, Indonesian | | | | | |
| bdm | | | I/L | Afro-Asiatic | | Buduma | | | | | |
| bdn | | | I/L | Afro-Asiatic | | Baldemu | | | | | |
| bdo | | | I/L | Nilo-Saharan | | Bernde | | | | | |
| bdp | | | I/L | Niger-Congo | | Bende | | | | | |
| bdq | | | I/L | Austroasiatic | | Bahnar | | | 巴拿语 | | |
| bdr | | | I/L | Austronesian | | Bajau, West Coast | | | | | |
| bds | | | I/L | Afro-Asiatic | | Burunge | | | | | |
| bdt | | | I/L | Niger-Congo | | Bokoto | | | | | |
| bdu | | | I/L | Niger-Congo | | Oroko | oroko | | | | |
| bdv | | | I/L | Indo-European | | Bodo Parja | | | | | |
| bdw | | | I/L | Trans-New Guinea | | Baham | | | | | |
| bdx | | | I/L | Austronesian | | Budong-Budong | | | | | |
| bdy | | | I/L | Pama-Nyungan | | Bandjalang | | | | | |
| bdz | | | I/L | Indo-European | | Badeshi | badeshî | | | | |
| bea | | | I/L | Na-Dené | Dunne-za | Beaver | | | | | |
| beb | | | I/L | Niger-Congo | | Bebele | bébélé | | | | |
| bec | | | I/L | Niger-Congo | | Iceve-Maci | | | | | |
| bed | | | I/L | Austronesian | | Bedoanas | | | | | |
| bee | | | I/L | Sino-Tibetan | | Byangsi | | | | | |
| bef | | | I/L | Trans-New Guinea | | Benabena | | | | | |
| beg | | | I/L | Austronesian | | Belait | | | | | |
| beh | | | I/L | Niger-Congo | | Biali | | | | | |
| bei | | | I/L | Austronesian | | Bekati' | | | | | |
| bej | | bej | I/L | Afro-Asiatic | بداوية | Beja | bedja | beja | 贝扎语; 贝贾语 | беджа | Bedscha |
| bek | | | I/L | Austronesian | | Bebeli | bébéli | | | | |
| bel | be | bel | I/L | Indo-European | беларуская | Belarusian | biélorusse | bielorruso | 白俄罗斯语 | белорусский | Weißrussisch |
| bem | | bem | I/L | Niger-Congo | ichibemba | Bemba (Zambia) | bemba | bemba | 本巴语; 别姆巴语 | бемба | Bemba |
| ben | bn | ben | I/L | Indo-European | বাংলা | Bengali | bengali | bengalí | 孟加拉语 | бенгальский | Bengalisch |
| beo | | | I/L | Niger-Congo | | Beami | | | | | |
| bep | | | I/L | Trans-New Guinea | | Besoa | | | | | |
| beq | | | I/L | Austronesian | | Beembe | | | | | |
| bes | | | I/L | Niger-Congo | | Besme | | | | | |
| bet | | | I/L | Niger-Congo | | Béte, Guiberoua | | | | | |
| beu | | | I/L | Timor-Alor-Pantar | | Blagar | | | | | |
| bev | | | I/L | Niger-Congo | | Bété, Daloa | | | | | |
| bew | | | I/L | Malay-based Creole | Bahasa Betawi | Betawi | | | | | |
| bex | | | I/L | Nilo-Saharan | | Jur Modo | | | | | |
| bey | | | I/L | Torricelli | | Beli (Papua New Guinea) | béli (Papouasie-Nouvelle-Guinée) | | | | |
| bez | | | I/L | Niger-Congo | | Bena (Tanzania) | béna (Tanzanie) | | | | |
| bfa | | | I/L | Nilo-Saharan | | Bari | | | 巴里语 | | Bari |
| bfb | | | I/L | Indo-European | | Bareli, Pauri | | | | | |
| bfc | | | I/L | Sino-Tibetan | | Bai, Northern | baï (du Nord) | | 碧江白语 | | |
| bfd | | | I/L | Niger-Congo | | Bafut | | | | | |
| bfe | | | I/L | Foja Range | | Betaf | | | | | |
| bff | | | I/L | Niger-Congo | | Bofi | | | | | |
| bfg | | | I/L | Austronesian | | Kayan, Busang | | | | | |
| bfh | | | I/L | Yam | | Blafe | | | | | |
| bfi | | | I/L | BANZSL | | British Sign Language | langue des signes britannique | | 英国手语 | | |
| bfj | | | I/L | Niger-Congo | | Bafanji | | | | | |
| bfk | | | I/L | village sign language | | Ban Khor Sign Language | langue des signes de Ban Khor | | | | |
| bfl | | | I/L | Niger-Congo | | Banda-Ndélé | | | | | |
| bfm | | | I/L | Niger-Congo | | Mmen | | | | | |
| bfn | | | I/L | Trans-New Guinea | | Bunak | | | | | |
| bfo | | | I/L | Niger-Congo | | Birifor, Malba | | | | | |
| bfp | | | I/L | Niger-Congo | | Beba | | | | | |
| bfq | | | I/L | Dravidian | ಬಡಗ | Badaga | | | 巴达加语 | | |
| bfr | | | I/L | Indo-European | | Bazigar | | | | | |
| bfs | | | I/L | Sino-Tibetan | | Bai, Southern | baï (du Sud) | | 大理白语 | | |
| bft | | | I/L | Sino-Tibetan | بلتی | Balti | | | | | |
| bfu | | | I/L | Sino-Tibetan | | Gahri | | | | | |
| bfw | | | I/L | Austroasiatic | | Bondo | | | | | |
| bfx | | | I/L | Austronesian | | Bantayanon | | | | | |
| bfy | | | I/L | Indo-European | | Bagheli | | | | | |
| bfz | | | I/L | Indo-European | | Pahari, Mahasu | | | | | |
| bga | | | I/L | Niger-Congo | | Gwamhi-Wuri | | | | | |
| bgb | | | I/L | Austronesian | | Bobongko | | | | | |
| bgc | | | I/L | Indo-European | | Haryanvi | | haryanví | 哈里亚纳语 | харянви | |
| bgd | | | I/L | Indo-European | | Bareli, Rathwi | | | | | |
| bge | | | I/L | Indo-European | | Bauria | | | | | |
| bgf | | | I/L | Niger-Congo | | Bangandu | | | | | |
| bgg | | | I/L | Sino-Tibetan | | Bugun | | | | | |
| (bgh) | | | I/L | Austroasiatic | | Bogan | | | | | |
| bgi | | | I/L | Austronesian | | Giangan | | | | | |
| bgj | | | I/L | Niger-Congo | | Bangolan | | | | | |
| bgk | | | I/L | Austroasiatic | | Bit | | | 布兴话 | | |
| bgl | | | I/L | Austroasiatic | | Bo (Laos) | | | | бо | |
| (bgm) | | | I/L | Niger-Congo | | Baga Mboteni | | | | | |
| bgn | | | I/L | Indo-European | | Balochi, Western | balotchî (occidental) | | 西俾路支语 | белуджский западный | |
| bgo | | | I/L | Niger-Congo | | Baga Koga | | | | | |
| bgp | | | I/L | Indo-European | | Balochi, Eastern | balotchî (oriental) | | 东俾路支语 | белуджский восточный | |
| bgq | | | I/L | Indo-European | | Bagri | | | | | |
| bgr | | | I/L | Sino-Tibetan | | Chin, Bawm | | | | | |
| bgs | | | I/L | Austronesian | | Tagabawa | | | | | |
| bgt | | | I/L | Austronesian | | Bughotu | | | | | |
| bgu | | | I/L | Niger-Congo | | Mbongno | | | | | |
| bgv | | | I/L | Trans-New Guinea | | Warkay-Bipim | | | | | |
| bgw | | | I/L | Indo-European | | Bhatri | | | | | |
| bgx | | | I/L | Turkic | | Balkan Gagauz Turkish | turc gagaouze des Balkans | | | | |
| bgy | | | I/L | Austronesian | | Benggoi | | | | | |
| bgz | | | I/L | Austronesian | | Banggai | | | | | |
| bha | | | I/L | Indo-European | | Bharia | | | | | |
| bhb | | | I/L | Indo-European | भीली | Bhili | bhili | bhili | 比尔语 | бхили | |
| bhc | | | I/L | Austronesian | | Biga | | | | | |
| bhd | | | I/L | Indo-European | | Bhadrawahi | | | | | |
| bhe | | | I/L | Indo-European | | Bhaya | | | | | |
| bhf | | | I/L | Senu River | | Odiai | | | | | |
| bhg | | | I/L | Trans-New Guinea | | Binandere | | | | | |
| bhh | | | I/L | Indo-European | | Bukharic | | | | | |
| bhi | | | I/L | Indo-European | | Bhilali | | | | | |
| bhj | | | I/L | Sino-Tibetan | | Bahing | | | | | |
| (bhk) | | | I/L | Austronesian | | Bicolano, Albay | | | | | |
| bhl | | | I/L | Trans-New Guinea | | Bimin | | | | | |
| bhm | | | I/L | Afro-Asiatic | | Bathari | | | | | |
| bhn | | | I/L | Afro-Asiatic | | Bohtan Neo-Aramaic | néo-araméen de Bohtan | | | | |
| bho | | bho | I/L | Indo-European | भोजपुरी | Bhojpuri | bhojpurî | bhojpurí | 博杰普尔语 | бходжпури | Bhojpuri |
| bhp | | | I/L | Austronesian | | Bima | | | | бима | |
| bhq | | | I/L | Austronesian | | Tukang Besi South | | | | | |
| bhr | | | I/L | Austronesian | | Malagasy, Bara | malgache (de Bara) | | | | |
| bhs | | | I/L | Afro-Asiatic | | Buwal | | | | | |
| bht | | | I/L | Indo-European | | Bhattiyali | | | | | |
| bhu | | | I/L | Indo-European | | Bhunjia | | | | | |
| bhv | | | I/L | Austronesian | | Bahau | | | | | |
| bhw | | | I/L | Austronesian | | Biak | | | | биак | |
| bhx | | | I/L | spurious | | Bhalay | | | | | |
| bhy | | | I/L | Niger-Congo | | Bhele | | | | | |
| bhz | | | I/L | Austronesian | | Bada (Indonesia) | bada (Indonésie) | | | | |
| bia | | | I/L | Pama-Nyungan | | Badimaya | | | | | |
| bib | | | I/L | Niger-Congo | | Bissa | | | | | |
| (bic) | | | I/L | Engan | | Bikaru | | | | | |
| bid | | | I/L | Afro-Asiatic | | Bidiyo | | | | | |
| bie | | | I/L | Madang | | Bepour | | | | | |
| bif | | | I/L | Niger-Congo | | Biafada | | | | | |
| big | | | I/L | Trans-New Guinea | | Biangai | | | | | |
| (bii) | | | I/L | Sino-Tibetan | | Bisu | | | | | |
| (bij) | | | I/L | Niger-Congo | | Vaghat-Ya-Bijim-Legeri | | | | | |
| bik | | bik | M/L | Austronesian | Bicol | Bikol | bikol | bikol | 比科尔语 | бикольский | Bikolano |
| bil | | | I/L | Niger-Congo | | Bile | bilé | | | | |
| bim | | | I/L | Niger-Congo | | Bimoba | | | | | |
| bin | | bin | I/L | Niger-Congo | Èdó | Bini | bini | | 比尼语 | бини | |
| bio | | | I/L | Senu River | | Nai | naï | | | | |
| bip | | | I/L | Niger-Congo | | Bila | | | | | |
| biq | | | I/L | Austronesian | | Bipi | | | | | |
| bir | | | I/L | Engan | | Bisorio | | | | | |
| bis | bi | bis | I/L | English Creole | Bislama | Bislama | bichlamar | bislama | 比斯拉马语; 比斯拉玛语 | бислама | Bislama |
| bit | | | I/L | Sepik | | Berinomo | | | | | |
| biu | | | I/L | Sino-Tibetan | | Biete | | | | | |
| biv | | | I/L | Niger-Congo | | Birifor, Southern | birifor (du Sud) | | | | |
| biw | | | I/L | Niger-Congo | | Kol (Cameroon) | kol (Cameroun) | | | | |
| bix | | | I/L | Austroasiatic | | Bijori | bijorî | | | | |
| biy | | | I/L | Austroasiatic | | Birhor | | | | | |
| biz | | | I/L | Niger-Congo | | Baloi | baloï | | | | |
| bja | | | I/L | Niger-Congo | | Budza | | | | | |
| bjb | | | I/E | Pama-Nyungan | | Banggarla | | | | | |
| bjc | | | I/L | Trans-New Guinea | | Bariji | barijî | | | | |
| (bjd) | | | I/L | Pama-Nyungan | | Bandjigali | | | | | |
| bje | | | I/L | Hmong-Mien | | Biao-Jiao Mien | | | 标藻语 | | |
| bjf | | | I/L | Afro-Asiatic | | Barzani Jewish Neo-Aramaic | néo-araméen juif barzani | | 巴尔扎尼犹太教亚拉姆语 | | |
| bjg | | | I/L | Niger-Congo | | Bidyogo | | | | | |
| bjh | | | I/L | Sepik | | Bahinemo | | | | | |
| bji | | | I/L | Afro-Asiatic | | Burji | | | | | |
| bjj | | | I/L | Indo-European | | Kanauji | | kanauji | | | |
| bjk | | | I/L | Austronesian | | Barok | | | | | |
| bjl | | | I/L | Austronesian | | Bulu (Papua New Guinea) | | | | | |
| bjm | | | I/L | Indo-European | | Bajelani | | | | | |
| bjn | | | I/L | Austronesian | | Banjar | | | | банджар | |
| bjo | | | I/L | Niger-Congo | | Banda, Mid-Southern | | | | | |
| bjp | | | I/L | Austronesian | | Fanamaket | | | | | |
| (bjq) | | | I/L | Austronesian | | Malagasy, Southern Betsimisaraka | malgache (betsimisaraka du Sud) | | | | |
| bjr | | | I/L | Trans-New Guinea | | Binumarien | | | | | |
| bjs | | | I/L | English Creole | | Bajan | | | | | |
| bjt | | | I/L | Niger-Congo | | Balanta-Ganja | | | | | |
| bju | | | I/L | Niger-Congo | | Busuu | | | | | |
| bjv | | | I/L | Nilo-Saharan | | Bedjond | | | | | |
| bjw | | | I/L | Niger-Congo | | Bakwé | | | | | |
| bjx | | | I/L | Austronesian | | Itneg, Banao | | | | | |
| bjy | | | I/E | Pama-Nyungan | | Bayali | | | | | |
| bjz | | | I/L | Trans-New Guinea | | Baruga | | | | | |
| bka | | | I/L | Niger-Congo | | Kyak | | | | | |
| (bkb) | | | I/L | Austronesian | | Finallig | | | | | |
| bkc | | | I/L | Niger-Congo | | Baka (Cameroon) | baka (Cameroun) | | | | |
| bkd | | | I/L | Austronesian | | Binukid | | | | | |
| (bke) | | | I/L | Austronesian | | Bengkulu | | | | | |
| bkf | | | I/L | Niger-Congo | | Beeke | | | | | |
| bkg | | | I/L | Niger-Congo | | Buraka | | | | | |
| bkh | | | I/L | Niger-Congo | | Bakoko | | | | | |
| bki | | | I/L | Austronesian | | Baki | | | | | |
| bkj | | | I/L | Niger-Congo | | Pande | | | | | |
| bkk | | | I/L | Indo-European | | Brokskat | | | | | |
| bkl | | | I/L | Foja Range | | Berik | | | | | |
| bkm | | | I/L | Niger-Congo | | Kom (Cameroon) | kom (Cameroun) | | | | |
| bkn | | | I/L | Austronesian | | Bukitan | | | | | |
| bko | | | I/L | Niger-Congo | | Kwa' | | | | | |
| bkp | | | I/L | Niger-Congo | | Boko (Democratic Republic of Congo) | boko (République démocratique du Congo) | | | | |
| bkq | | | I/L | Cariban | | Bakairí | | bacairí | | | |
| bkr | | | I/L | Austronesian | | Bakumpai | | | | | |
| bks | | | I/L | Austronesian | | Sorsogon, Masbate | | | | | |
| bkt | | | I/L | Niger-Congo | | Boloki | | | | болоки | |
| bku | | | I/L | Austronesian | | Buhid | bouhide | | | | |
| bkv | | | I/L | Niger-Congo | | Bekwarra | | | | | |
| bkw | | | I/L | Niger-Congo | | Bekwil | | | | | |
| bkx | | | I/L | Austronesian | | Baikeno | | | | | |
| bky | | | I/L | Niger-Congo | | Bokyi | | | | | |
| bkz | | | I/L | Austronesian | | Bungku | | | | | |
| bla | | bla | I/L | Algic | | Blackfoot | pied-noir (siksika) | pies negros | 西克西卡语 | блэкфут | Schwarzfuss |
| blb | | | I/L | Central Solomon | | Bilua | | | | | |
| blc | | | I/L | Salishan | | Bella Coola | | | | | |
| bld | | | I/L | Austronesian | | Bolango | | | | | |
| ble | | | I/L | Niger-Congo | | Balanta-Kentohe | | | | | |
| blf | | | I/L | Austronesian | | Buol | | | | | |
| (blg) | | | I/L | Austronesian | | Balau | | | | | |
| blh | | | I/L | Niger-Congo | | Kuwaa | | | | | |
| bli | | | I/L | Niger-Congo | | Bolia | | | | | |
| blj | | | I/L | Austronesian | | Bolongan | | | | | |
| blk | | | I/L | Sino-Tibetan | | Karen, Pa'o | karène (Pa’o) | | | | |
| bll | | | I/E | Siouan | | Biloxi | | biloxi | | | |
| blm | | | I/L | Nilo-Saharan | | Beli (Sudan) | | | | | |
| bln | | | I/L | Austronesian | | Bicolano, Southern Catanduanes | | | | | |
| blo | | | I/L | Niger-Congo | | Anii | | | | | |
| blp | | | I/L | Austronesian | | Blablanga | | | | | |
| blq | | | I/L | Austronesian | | Baluan-Pam | | | | | |
| blr | | | I/L | Austroasiatic | | Blang | | | 布朗语 | | |
| bls | | | I/L | Austronesian | | Balaesang | | | | | |
| blt | | | I/L | Kra-Dai | | Tai Dam | | | 傣担语 | | |
| (blu) | | | I/L | Hmong-Mien | | Hmong Njua | | | | | |
| blv | | | I/L | Niger-Congo | | Bolo | | | | | |
| blw | | | I/L | Austronesian | | Balangao | | | | | |
| blx | | | I/L | Austronesian | | Ayta, Mag-Indi | | | | | |
| bly | | | I/L | Niger-Congo | | Notre | | | | | |
| blz | | | I/L | Austronesian | | Balantak | | | | | |
| bma | | | I/L | Niger-Congo | | Lame | | | | | |
| bmb | | | I/L | Niger-Congo | | Bembe | | | | бембе | |
| bmc | | | I/L | Austronesian | | Biem | | | | | |
| bmd | | | I/L | Niger-Congo | | Baga Manduri | | | | | |
| bme | | | I/L | Niger-Congo | | Limassa | | | | | |
| bmf | | | I/L | Niger-Congo | | Bom | | | | | |
| bmg | | | I/L | Niger-Congo | | Bamwe | | | | | |
| bmh | | | I/L | Trans-New Guinea | | Kein | | | | | |
| bmi | | | I/L | Nilo-Saharan | | Bagirmi | | | 巴吉尔米语 | | |
| bmj | | | I/L | Indo-European | | Bote-Majhi | | | | | |
| bmk | | | I/L | Austronesian | | Ghayavi | | | | | |
| bml | | | I/L | Niger-Congo | | Bomboli | | | | | |
| bmm | | | I/L | Austronesian | | Malagasy, Northern Betsimisaraka | malgache (betsimisaraka du Nord) | | | | |
| bmn | | | I/E | Austronesian | | Bina (Papua New Guinea) | | | | | |
| bmo | | | I/L | Niger-Congo | | Bambalang | | | | | |
| bmp | | | I/L | Trans-New Guinea | | Bulgebi | | | | | |
| bmq | | | I/L | Niger-Congo | | Bomu | | | | | |
| bmr | | | I/L | Boran | | Muinane | | muinane | | | |
| bms | | | I/L | Nilo-Saharan | | Kanuri, Bilma | | | | | |
| bmt | | | I/L | Hmong-Mien | | Biao Mon | | | 标敏语 | | |
| bmu | | | I/L | Trans-New Guinea | | Burum-Mindik | | | | | |
| bmv | | | I/L | Niger-Congo | | Bum | | | | | |
| bmw | | | I/L | Niger-Congo | | Bomwali | | | | | |
| bmx | | | I/L | Trans-New Guinea | | Baimak | | | | | |
| (bmy) | | | I/L | spurious | | Bemba (Democratic Republic of Congo) | bemba (République démocratique du Congo) | | | | |
| bmz | | | I/L | Trans-New Guinea | | Baramu | | | | | |
| bna | | | I/L | Austronesian | | Bonerate | | | | | |
| bnb | | | I/L | Austronesian | | Bookan | | | | | |
| bnc | | | M/L | Austronesian | | Bontoc, Central | | | | | |
| bnd | | | I/L | Austronesian | | Banda (Indonesia) | banda (Indonésie) | | | | |
| bne | | | I/L | Austronesian | | Bintauna | | | | | |
| bnf | | | I/L | Austronesian | | Masiwang | | | | мазиванг | |
| bng | | | I/L | Niger-Congo | | Benga | | | | бенга | |
| (bnh) | | | I/L | Arawan | | Banawá | | | | | |
| bni | | | I/L | Niger-Congo | | Bangi | | | | | |
| bnj | | | I/L | Austronesian | | Tawbuid, Eastern | | | | | |
| bnk | | | I/L | Austronesian | | Bierebo | | | | | |
| bnl | | | I/L | Afro-Asiatic | | Boon | | | | | |
| bnm | | | I/L | Niger-Congo | | Batanga | | | | | |
| bnn | | | I/L | Austronesian | | Bunun | | | 布农语 | | |
| bno | | | I/L | Austronesian | | Bantoanon | | | | | |
| bnp | | | I/L | Austronesian | | Bola | | | | | |
| bnq | | | I/L | Austronesian | | Bantik | | | | бантик | |
| bnr | | | I/L | Austronesian | | Butmas-Tur | | | | | |
| bns | | | I/L | Indo-European | | Bundeli | | bundeli | | бундели | |
| bnu | | | I/L | Austronesian | | Bentong | | | | | |
| bnv | | | I/L | Foja Range | | Beneraf, Bonerif, Edwas | | | | | |
| bnw | | | I/L | Sepik | | Bisis | | | | | |
| bnx | | | I/L | Niger-Congo | | Bangubangu | | | | бангубангу | |
| bny | | | I/L | Austronesian | | Bintulu | | | | | |
| bnz | | | I/L | Niger-Congo | | Beezen | | | | | |
| boa | | | I/L | Boran | | Bora | | bora | | | |
| bob | | | I/L | Afro-Asiatic | | Boni | | | | | |
| (boc) | | | I/L | Austronesian | | Bakung Kenyah | | | | | |
| bod | bo | tib | I/L | Sino-Tibetan | བོད་ཡིག | Tibetan | tibétain | tibetano | 藏语; 卫藏语 | тибетский | Tibetisch |
| boe | | | I/L | Niger-Congo | | Mundabli | | | | | |
| bof | | | I/L | Niger-Congo | | Bolon | | | | | |
| bog | | | I/L | Deaf-community sign language | | Bamako Sign Language | langue des signes de Bamako | | 巴马科手语 | | |
| boh | | | I/L | Niger-Congo | | Boma | | | | бома | |
| boi | | | I/E | Chumashan | | Barbareño | | | | | |
| boj | | | I/L | Trans-New Guinea | | Anjam | | | | | |
| bok | | | I/L | Niger-Congo | | Bonjo | | | | | |
| bol | | | I/L | Afro-Asiatic | | Bole | | | | | |
| bom | | | I/L | Niger-Congo | | Berom | | | | | |
| bon | | | I/L | Trans-Fly | | Bine | | | | | |
| boo | | | I/L | Niger-Congo | | Bozo, Tièma Cièwè | | | | | |
| bop | | | I/L | Trans-New Guinea | | Bonkiman | | | | | |
| boq | | | I/L | Trans-New Guinea | | Bogaya | | | | | |
| bor | | | I/L | Macro-Jê | | Borôro | | | | | |
| bos | bs | bos | I/L | Indo-European | bosanski | Bosnian | bosniaque | bosnio | 波斯尼亚语; 波士尼亚语 | боснийский | Bosnisch |
| bot | | | I/L | Nilo-Saharan | | Bongo | | | | | |
| bou | | | I/L | Niger-Congo | | Bondei | | | | бондей | |
| bov | | | I/L | Niger-Congo | | Tuwuli | | | | | |
| bow | | | I/E | Trans-Fly | | Rema | | | | | |
| box | | | I/L | Niger-Congo | | Buamu | | | | | |
| boy | | | I/L | Niger-Congo | | Bodo (Central African Republic) | bodo (centrafricain) | | | | |
| boz | | | I/L | Niger-Congo | | Bozo, Tiéyaxo | | | | | |
| bpa | | | I/L | | | Dakaka | | | | | |
| (bpb) | | | I/E | spurious language | | Barbacoas | | | | | |
| bpc | | | I/L | Niger–Congo | | Mbuk | | | | | |
| bpd | | | I/L | | | Banda-Banda | | | | | |
| bpe | | | I/L | Skou | | Bauni | | | | | |
| bpg | | | I/L | | | Bonggo | | | | | |
| bph | | | I/L | | | Botlikh | | botlikh | 博特利赫语 | | |
| bpi | | | I/L | | | Bagupi | | | | | |
| bpj | | | I/L | | | Binji | | | | | |
| bpk | | | I/L | | | Orowe | | | | | |
| bpl | | | I/L | | | Broome Pearling Lugger Pidgin | | | | | |
| bpm | | | I/L | | | Biyom | | | | | |
| bpn | | | I/L | | | Dzao Min | | | 八排瑶语; 藻敏语 | | |
| bpo | | | I/L | | | Anasi | | | | | |
| bpp | | | I/L | | | Kaure | | | | | |
| bpq | | | I/L | | | Malay, Banda | | | | | |
| bpr | | | I/L | | | Blaan, Koronadal | | | | | |
| bps | | | I/L | | | Blaan, Sarangani | | | | | |
| bpt | | | I/E | | | Barrow Point | | | | | |
| bpu | | | I/L | | | Bongu | | | | | |
| bpv | | | I/L | | | Marind, Bian | | | | | |
| bpw | | | I/L | | | Bo (Papua New Guinea) | bô (Papouasie-Nouvelle-Guinée) | | | | |
| bpx | | | I/L | | | Bareli, Palya | | | | | |
| bpy | | | I/L | Indo-European | বিষ্ণুপ্রিয়া মণিপুরী | Bishnupriya Manipuri | bishnupriya manipuri | Bishnupriya Manipuri | 比什奴普莱利亚-曼尼浦尔语 | бишнуприя-манипури | Bishnupriya Manipuri |
| bpz | | | I/L | | | Bilba | | | | | |
| bqa | | | I/L | | | Tchumbuli | | | | | |
| bqb | | | I/L | | | Bagusa | | | | | |
| bqc | | | I/L | | | Boko (Benin) | | | | | |
| bqd | | | I/L | | | Bung | | | | | |
| (bqe) | | | I/L | | | Navarro-Labourdin Basque | | | | | |
| bqf | | | I/E | | | Baga Kaloum | | | | | |
| bqg | | | I/L | | | Bago-Kusuntu | | | | | |
| bqh | | | I/L | | | Baima | | | 白马语 | | |
| bqi | | | I/L | | | Bakhtiari | | | 巴克提尔利语 | бахтиарский диалект | |
| bqj | | | I/L | | | Bandial | | | | | |
| bqk | | | I/L | | | Banda-Mbrès | | | | | |
| bql | | | I/L | | | Bilakura | | | | | |
| bqm | | | I/L | | | Wumboko | | | | | |
| bqn | | | I/L | | | Bulgarian Sign Language | langue des signes bulgare | | 保加利亚手语 | | |
| bqo | | | I/L | | | Balo | | | | | |
| bqp | | | I/L | | | Busa | | | | | |
| bqq | | | I/L | | | Biritai | | | | | |
| bqr | | | I/L | | | Burusu | | | | | |
| bqs | | | I/L | | | Bosngun | | | | | |
| bqt | | | I/L | | | Bamukumbit | | | | | |
| bqu | | | I/L | | | Boguru | | | | | |
| bqv | | | I/L | | | Begbere-Ejar | | | | | |
| bqw | | | I/L | | | Buru (Nigeria) | | | | | |
| bqx | | | I/L | | | Baangi | | | | | |
| bqy | | | I/L | | | Bali Sign Language | langue des signe balinaise | | | | |
| bqz | | | I/L | | | Bakaka | | | | | |
| bra | | bra | I/L | | | Braj | braj | | 布拉吉语 | | |
| brb | | | I/L | | | Lave | | | | | |
| brc | | | I/E | | | Berbice Creole Dutch | créole néerlandais de Berbice | | | | |
| brd | | | I/L | | | Baraamu | | | | | |
| bre | br | bre | I/L | Indo-European | brezhoneg | Breton | breton | bretón | 布列塔尼语 | бретонский | Bretonisch |
| brf | | | I/L | | | Bera | | | | | |
| brg | | | I/L | | | Baure | | | | | |
| brh | | | I/L | | | Brahui | | | 布拉灰语 | брауи | |
| bri | | | I/L | | | Mokpwe | | | | | |
| brj | | | I/L | | | Bieria | | | | | |
| brk | | | I/E | | | Birked | | | | | |
| brl | | | I/L | | | Birwa | | | | | |
| brm | | | I/L | | | Barambu | | | | | |
| brn | | | I/L | | | Boruca | | boruca | | | |
| bro | | | I/L | | | Brokkat | | | | | |
| brp | | | I/L | | | Barapasi | | | | | |
| brq | | | I/L | | | Breri | | | | | |
| brr | | | I/L | | | Birao | | | | | |
| brs | | | I/L | | | Baras | | | | | |
| brt | | | I/L | | | Bitare | | | 比塔拉语 | | |
| bru | | | I/L | | | Bru, Eastern | | | | | |
| brv | | | I/L | | | Bru, Western | | | | | |
| brw | | | I/L | | | Bellari | | | | | |
| brx | | | I/L | | | Bodo (India) | bodo (Inde) | bodo | 博多语 | бодо | |
| bry | | | I/L | | | Burui | | | | | |
| brz | | | I/L | | | Bilbil | | | | | |
| bsa | | | I/L | | | Abinomn | | | | | |
| bsb | | | I/L | | | Bisaya, Brunei | bissaya (de Brunéi) | | | | |
| bsc | | | I/L | | | Bassari | | | | | |
| (bsd) | | | I/L | | | Sarawak Bisaya | | | | | |
| bse | | | I/L | | | Wushi | | | | | |
| bsf | | | I/L | | | Bauchi | | | | | |
| bsg | | | I/L | | | Bashkardi | | | | | |
| bsh | | | I/L | | | Kati | | | | | |
| bsi | | | I/L | | | Bassossi | | | | | |
| bsj | | | I/L | | | Bangwinji | | | | | |
| bsk | | | I/L | | | Burushaski | | | 布鲁沙斯基语; 布鲁夏斯基语 | бурушаски | |
| bsl | | | I/E | | | Basa-Gumna | | | | | |
| bsm | | | I/L | | | Busami | | | | | |
| bsn | | | I/L | | | Barasana | | barasana | | | |
| bso | | | I/L | | | Buso | | | | | |
| bsp | | | I/L | | | Baga Sitemu | | | | | |
| bsq | | | I/L | | | Bassa | | | 巴沙语 | | |
| bsr | | | I/L | | | Bassa-Kontagora | | | | | |
| bss | | | I/L | | | Akoose | | | | | |
| bst | | | I/L | | | Basketo | | | | | |
| bsu | | | I/L | | | Bahonsuai | | | | | |
| bsv | | | I/E | | | Baga Sobané | | | | | |
| bsw | | | I/L | | | Baiso | | | | | |
| bsx | | | I/L | | | Yangkam | | | | | |
| bsy | | | I/L | | | Bisaya, Sabah | bissaya (de Sabah) | | | | |
| (bsz) | | | I/L | | | Souletin Basque | | | | | |
| bta | | | I/L | | | Bata | | | | | |
| (btb) | | | I/L | | | Beti (Cameroon) | | | | | |
| btc | | | I/L | | | Bati (Cameroon) | | | | | |
| btd | | | I/L | | | Batak Dairi | | | | | |
| bte | | | I/E | | | Gamo-Ningi | | | | | |
| btf | | | I/L | | | Birgit | | | | | |
| btg | | | I/L | | | Bété, Gagnoa | | | | | |
| bth | | | I/L | | | Biatah | | | | | |
| bti | | | I/L | | | Burate | | | | | |
| btj | | | I/L | | | Malay, Bacanese | malais (bacanais) | | | | |
| (btl) | | | I/L | | | Bhatola | | | | | |
| btm | | | I/L | | | Batak Mandailing | | | | | |
| btn | | | I/L | | | Ratagnon | | | | | |
| bto | | | I/L | | | Bicolano, Iriga | | | | диалект ринконада (ирига-бикольский) | |
| btp | | | I/L | | | Budibud | | | | | |
| btq | | | I/L | | | Batek | | | | | |
| btr | | | I/L | | | Baetora | | | | | |
| bts | | | I/L | | | Batak Simalungun | | | | | |
| btt | | | I/L | | | Bete-Bendi | | | | | |
| btu | | | I/L | | | Batu | | | 巴图语 | | |
| btv | | | I/L | | | Bateri | | | | | |
| btw | | | I/L | | | Butuanon | | | | | |
| btx | | | I/L | | | Batak Karo | | | | | |
| bty | | | I/L | | | Bobot | | | | бобот | |
| btz | | | I/L | | | Batak Alas-Kluet | | | | | |
| bua | | bua | M/L | | буряад | Buriat | bouriate | | 布里亚特语 | бурятский | |
| bub | | | I/L | | | Bua | | | | | |
| buc | | | I/L | | | Bushi | | | | | |
| bud | | | I/L | | | Ntcham | | | | | |
| bue | | | I/E | | | Beothuk | | | | | |
| buf | | | I/L | | | Bushoong | | | | бушонг | |
| bug | | bug | I/L | | ᨅᨔ ᨕᨘᨁᨗ | Buginese | bugi | | 布吉语 | бугийский | |
| buh | | | I/L | | | Bunu, Younuo | | | 优诺布努语 | | |
| bui | | | I/L | | | Bongili | | | | | |
| buj | | | I/L | | | Basa-Gurmana | | | | | |
| buk | | | I/L | | | Bugawac | | | | | |
| bul | bg | bul | I/L | Indo-European | български | Bulgarian | bulgare | búlgaro | 保加利亚语 | болгарский | Bulgarisch |
| bum | | | I/L | | | Bulu (Cameroon) | | | | | |
| bun | | | I/L | | | Sherbro | | | | | |
| buo | | | I/L | | | Terei | | | | | |
| bup | | | I/L | | | Busoa | | | | | |
| buq | | | I/L | | | Brem | | | | | |
| bus | | | I/L | | | Bokobaru | | | | | |
| but | | | I/L | | | Bungain | | | | | |
| buu | | | I/L | | | Budu | | | | | |
| buv | | | I/L | | | Bun | | | | | |
| buw | | | I/L | | | Bubi | | | 布比语 | буби | |
| bux | | | I/L | | | Boghom | | | | | |
| buy | | | I/L | | | Bullom So | | | | | |
| buz | | | I/L | | | Bukwen | | | | | |
| bva | | | I/L | | | Barein | | | | | |
| bvb | | | I/L | | | Bube | | | | | |
| bvc | | | I/L | | | Baelelea | | | | | |
| bvd | | | I/L | | | Baeggu | | | | | |
| bve | | | I/L | | | Malay, Berau | malais (Berau) | | | | |
| bvf | | | I/L | | | Boor | | | | | |
| bvg | | | I/L | | | Bonkeng | | | | | |
| bvh | | | I/L | | | Bure | | | | | |
| bvi | | | I/L | | | Belanda Viri | | | | | |
| bvj | | | I/L | | | Baan | | | | | |
| bvk | | | I/L | | | Bukat | | | | букат | |
| bvl | | | I/L | | | Bolivian Sign Language | langue des signes bolivienne | | 玻利维亚手语 | | |
| bvm | | | I/L | | | Bamunka | | | | | |
| bvn | | | I/L | | | Buna | | | | | |
| bvo | | | I/L | | | Bolgo | | | | | |
| bvp | | | I/L | | | Bumang | | | | | |
| bvq | | | I/L | | | Birri | | | | | |
| bvr | | | I/L | | | Burarra | | | | | |
| (bvs) | | | I/L | | | Belgian Sign Language | | | | | |
| bvt | | | I/L | | | Bati (Indonesia) | bati (Indonésie) | | | | |
| bvu | | | I/L | | | Malay, Bukit | malais (Bukit) | | | | |
| bvv | | | I/E | | | Baniva | | | | | |
| bvw | | | I/L | | | Boga | | | | | |
| bvx | | | I/L | | | Dibole | | | | | |
| bvy | | | I/L | | | Baybayanon | | | | | |
| bvz | | | I/L | | | Bauzi | | | | | |
| bwa | | | I/L | | | Bwatoo | | | | | |
| bwb | | | I/L | | | Namosi-Naitasiri-Serua | | | | | |
| bwc | | | I/L | | | Bwile | | | | | |
| bwd | | | I/L | | | Bwaidoka | | | | буайдока | |
| bwe | | | I/L | | | Karen, Bwe | karène (Bwé) | | | | |
| bwf | | | I/L | | | Boselewa | | | | | |
| bwg | | | I/L | | | Barwe | | | | | |
| bwh | | | I/L | | | Bishuo | | | | | |
| bwi | | | I/L | | | Baniwa | | | | | |
| bwj | | | I/L | | | Bwamu, Láá Láá | | | | | |
| bwk | | | I/L | | | Bauwaki | | | | | |
| bwl | | | I/L | | | Bwela | | | | | |
| bwm | | | I/L | | | Biwat | | | | | |
| bwn | | | I/L | | | Bunu, Wunai | | | 唔奈布努语 | | |
| bwo | | | I/L | | | Boro | | | | | |
| bwp | | | I/L | | | Mandobo Bawah | | | | | |
| bwq | | | I/L | | | Bobo Madaré, Southern | bobo madaré (du Sud) | | | южный бобо мандаре | |
| bwr | | | I/L | | | Bura-Pabir | | | | | |
| bws | | | I/L | | | Bomboma | | | | | |
| bwt | | | I/L | | | Bafaw-Balong | | | | | |
| bwu | | | I/L | | | Buli (Ghana) | | | | | |
| (bwv) | | | I/L | | | Bahau River Kenyah | | | | | |
| bww | | | I/L | | | Bwa | | | | | |
| bwx | | | I/L | | | Bunu, Bu-Nao | | | 布-瑙布努语 | | |
| bwy | | | I/L | | | Bwamu, Cwi | | | | | |
| bwz | | | I/L | | | Bwisi | | | | | |
| bxa | | | I/L | | | Bauro | | | | | |
| bxb | | | I/L | | | Belanda Bor | | | | | |
| bxc | | | I/L | | | Molengue | | | | | |
| bxd | | | I/L | | | Pela | | | 布拉语 | | |
| bxe | | | I/L | | | Birale | | | | | |
| bxf | | | I/L | | | Bilur | | | | | |
| bxg | | | I/L | | | Bangala | | | | | |
| bxh | | | I/L | | | Buhutu | | | | | |
| bxi | | | I/E | | | Pirlatapa | | | | | |
| bxj | | | I/L | | | Bayungu | | | | | |
| bxk | | | I/L | | | Bukusu | | | | | |
| bxl | | | I/L | | | Jalkunan | | | | | |
| bxm | | | I/L | | | Buriat, Mongolia | bouriate (Mongolie) | | 蒙古布里亚特语 | бурятский (Монголия) | |
| bxn | | | I/L | | | Burduna | | | | | |
| bxo | | | I/L | | | Barikanchi | | | | | |
| bxp | | | I/L | | | Bebil | | | | | |
| bxq | | | I/L | | | Beele | | | | | |
| bxr | | | I/L | | | Buriat, Russia | bouriate (Russie) | | 俄罗斯布里亚特语 | бурятский (Россия) | |
| bxs | | | I/L | | | Busam | | | | | |
| (bxt) | | | I/L | | | Buxinhua | | | | | |
| bxu | | | I/L | | | Buriat, China | bouriate (Chine) | | 巴尔虎布里亚特语 | бурятский (Китай) | |
| bxv | | | I/L | | | Berakou | | | | | |
| bxw | | | I/L | | | Bankagooma | | | | | |
| (bxx) | | | I/L | | | Borna | | | | | |
| bxz | | | I/L | | | Binahari | | | | | |
| bya | | | I/L | | | Batak | | | 巴塔克语 | | |
| byb | | | I/L | | | Bikya | | | | | |
| byc | | | I/L | | | Ubaghara | | | | | |
| byd | | | I/L | | | Benyadu' | | | | | |
| bye | | | I/L | | | Pouye | | | | | |
| byf | | | I/L | | | Bete | | beté | | | |
| byg | | | I/E | | | Baygo | | | | | |
| byh | | | I/L | | | Bujhyal | | | | | |
| byi | | | I/L | | | Buyu | | | | | |
| byj | | | I/L | | | Bina (Nigeria) | bina (Nigéria) | | | | |
| byk | | | I/L | | | Biao | | | 标话 | | |
| byl | | | I/L | | | Bayono | | | | | |
| bym | | | I/L | | | Bidyara | | | | | |
| byn | | byn | I/L | | | Bilin | bilen | | 比林语 | | |
| byo | | | I/L | | | Biyo | | | 碧约语 | | |
| byp | | | I/L | | | Bumaji | | | | бумаджи (язык группы бенди) | |
| byq | | | I/E | | | Basay | | | 马赛语 | | |
| byr | | | I/L | | | Baruya | | | | | |
| bys | | | I/L | | | Burak | | | | | |
| byt | | | I/E | | | Berti | | | | | |
| (byu) | | | I/L | | | Buyang | | | | | |
| byv | | | I/L | | | Medumba | | | | | |
| byw | | | I/L | | | Belhariya | | | | | |
| byx | | | I/L | | | Qaqet | | | | | |
| (byy) | | | I/L | | | Buya | | | | | |
| byz | | | I/L | | | Banaro | | | | | |
| bza | | | I/L | | | Bandi | | | | | |
| bzb | | | I/L | | | Andio | | | | | |
| bzc | | | I/L | | | Southern Betsimisaraka Malagasy | | | | | |
| bzd | | | I/L | | | Bribri | | bribri | 布里布里语 | | |
| bze | | | I/L | | | Bozo, Jenaama | | | | | |
| bzf | | | I/L | | | Boikin | | | | | |
| bzg | | | I/L | | | Babuza | | | 猫雾语 | бабуза | |
| bzh | | | I/L | | | Buang, Mapos | | | | | |
| bzi | | | I/L | | | Bisu | | | 毕苏语 | | |
| bzj | | | I/L | | | Belize Kriol English | créole anglais belizéen | | 伯利兹克里奥尔英语 | | |
| bzk | | | I/L | | | Nicaragua Creole English | créole anglais nicaraguais | | 尼加拉瓜克里奥尔英语 | | |
| bzl | | | I/L | | | Boano (Sulawesi) | | | | | |
| bzm | | | I/L | | | Bolondo | | | | | |
| bzn | | | I/L | | | Boano (Maluku) | | | | | |
| bzo | | | I/L | | | Bozaba | | | | | |
| bzp | | | I/L | | | Kemberano | | | | | |
| bzq | | | I/L | | | Buli (Indonesia) | | | | | |
| bzr | | | I/E | | | Biri | | | | | |
| bzs | | | I/L | | | Brazilian Sign Language | langue des signes brésilienne | | 巴西手语 | | brasilianische Zeichensprache |
| bzt | | | I/C | | | Brithenig | britonnique | | | | |
| bzu | | | I/L | | | Burmeso | | | | | |
| bzv | | | I/L | | | Bebe | | | | | |
| bzw | | | I/L | | | Basa (Nigeria) | bassa (Nigéria) | | | | |
| bzx | | | I/L | | | Bozo, Hainyaxo | | | | | |
| bzy | | | I/L | | | Obanliku | | | | | |
| bzz | | | I/L | | | Evant | | | | | |