| English | eng-000 | CKR |
| ISO 639-3 | art-001 | ckr |
| Peace Corps 2007 Tamazight | tzm-009 | ckr |
| ISO 639-PanLex | art-274 | ckr-000 |
| toskërishte | als-000 | çkridhem |
| Yavapai | yuf-002 | čkr=ˈot-i |
| ISO 639-3 | art-001 | cks |
| Kunza | kuz-000 | cks |
| ISO 639-PanLex | art-274 | cks-000 |
| English | eng-000 | CKSB |
| français | fra-000 | CKSB |
| Tsimshian | tsi-000 | ckshan |
| Tsimshian | tsi-000 | ckshgeeg |
| Tsimshian | tsi-000 | ckshoa |
| ISO 639-3 | art-001 | ckt |
| ISO 639 | art-005 | ckt |
| filename extensions | art-335 | ckt |
| English | eng-000 | ckt |
| English | eng-000 | ckt. |
| Nuxálk | blc-000 | c̷ˀkt-∅ |
| ISO 639-PanLex | art-274 | ckt-000 |
| ISO 639-PanLex | art-274 | ckt-001 |
| ISO 639-PanLex | art-274 | ckt-002 |
| Nuxálk | blc-000 | c̷ˀkta-∅ |
| TechTarget file types | art-336 | CKT-B2-Spice-Curcuit-Design-Beige-Bag-Software-Inc |
| TechTarget file types | art-336 | CKT-CADKEY-template-file |
| TechTarget file types | art-336 | CKT-CircuitMaker-File |
| TechTarget file types | art-336 | CKT-CircuitMaker-schematic |
| TechTarget file types | art-336 | CKT-Crocodile-Clips-file |
| TechTarget file types | art-336 | CKT-KeyCreator-Template-File-Kubotek-USA-Inc |
| Alsea | aes-000 | cku |
| ISO 639-3 | art-001 | cku |
| la lojban. | jbo-000 | cku |
| Khoirao | nki-000 | č-ku |
| Kachin | kac-000 | č-k’u` |
| Cha7³¹ tinyan³ | ctz-000 | čku |
| ISO 639-PanLex | art-274 | cku-000 |
| Kunza | kuz-000 | ckúc-kun-tur |
| Valman | van-000 | Ckuel |
| Malecite-Passamaquoddy | pqm-000 | ckuhtaqot |
| Malecite-Passamaquoddy | pqm-000 | ckuhye |
| toskërishte | als-000 | çkuilibrim |
| Kunza | kuz-000 | ckuitchar |
| Kunza | kuz-000 | ckúlan |
| magyar | hun-000 | C-kulcs |
| magyar | hun-000 | c-kulcs |
| la lojban. | jbo-000 | ckule |
| Northern Sinkyone | wlk-003 | ʼc.kul.laʼ |
| Kunza | kuz-000 | ckulub |
| English | eng-000 | C. Kumar N. Patel |
| English | eng-000 | CKUM-FM |
| français | fra-000 | CKUM-FM |
| Barbareño | boi-000 | ckumu |
| Cruzeño | crz-000 | ckumu |
| Samala | inz-000 | ckumu |
| Ventureño | veo-000 | ckumu |
| Kunza | kuz-000 | ckun |
| Kunza | kuz-000 | cku-na-tur |
| Kunza | kuz-000 | ckunna |
| Kunza | kuz-000 | ckun-tur |
| la lojban. | jbo-000 | ckunu |
| English | eng-000 | C Kuppusami |
| svenska | swe-000 | C Kuppusami |
| Kunza | kuz-000 | ckurasa |
| Kunza | kuz-000 | cku-ra-tur |
| toskërishte | als-000 | çkurdis |
| pʼurhépecha uantakua | tsz-000 | Ckuri |
| Tarascan | tsz-001 | Ckuri |
| Kunza | kuz-000 | ckuri |
| toskërishte | als-000 | çkurorëzim |
| toskërishte | als-000 | çkurorëzohem |
| shqip | sqi-000 | çkurorëzohem |
| Kunza | kuz-000 | ckuru |
| Pawnee | paw-000 | ckúsaat |
| Pawnee | paw-000 | ckusu7 |
| Kunza | kuz-000 | ckuta |
| Kunza | kuz-000 | ckutchi |
| Kunza | kuz-000 | cku-tchin-tur |
| Kunza | kuz-000 | ckutchir |
| Kunza | kuz-000 | ckutchubí |
| Kunza | kuz-000 | ckut-ta |
| Kunza | kuz-000 | ckutta |
| Kunza | kuz-000 | ckutti |
| Kunza | kuz-000 | cku-tup-tur |
| Thavung | thm-000 | ckuu⁴ |
| Pawnee | paw-000 | ckuusuʼ |
| Malecite-Passamaquoddy | pqm-000 | ckuwahkuhucin |
| Malecite-Passamaquoddy | pqm-000 | ckuwapon |
| Malecite-Passamaquoddy | pqm-000 | ckuwi |
| Malecite-Passamaquoddy | pqm-000 | ckuwye |
| ISO 639-3 | art-001 | ckv |
| filename extensions | art-335 | ckv |
| ISO 639-PanLex | art-274 | ckv-000 |
| TechTarget file types | art-336 | CKV-CheckVision-Database-CheckVision-GmbH |
| Deutsch | deu-000 | CKW |
| ISO 639-3 Retired Code Elements | art-324 | ckw |
| English | eng-000 | ckw |
| Nuxálk | blc-000 | c̷kʷ-∅ |
| Tillamook | til-000 | ckw~373l |
| Fox | sac-001 | -`ckwä- |
| Cha7³¹ tinyan³ | ctz-000 | čkʷa |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã ča |
| Alsea | aes-000 | ckw~aisalyust" |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã kaʔa |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã ndihʸu |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã ndlaʔa yū |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã ndʸō |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã nskã- |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã paʼla |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã skĩʔ |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã stãʔ |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã tu-naʔã |
| Cha7³¹ tinyan³ | ctz-000 | čkʷã ynĩ yaʔ- |
| Cha7³¹ tinyan³ | ctz-000 | čkʷaʔ |
| xʷsenəčqən | str-000 | čkʷeʔ |
| xʷsenəčqən | str-000 | čkʷeʔ ʔə ƛ̕ sqʷel |
| Fox | sac-001 | -`ckwi- |
| Ñomndaa | amu-000 | ckw~i |
| Nahuatl San Pedro Jicora | azd-001 | ckw~i |
| Náhuatl de Xilocuautla Huauchinango | ncj-002 | ckw~i |
| Náhuatl de San Agustin Oapan | ngu-003 | ckw~i |
| Náhuatl de Cuacuila Huauchinango | nhi-000 | ckw~i |
| Nahuatl Amilcingo Zacualpan | nhm-001 | ckw~i |
| Nahuatl Coyotepec | nhq-001 | ckw~i |
| Náhuatl de San Jose Miahuatlan | npl-000 | ckw~i |
| Náhuatl de San Miguel Ayotla | nhn-001 | ckw~i* |
| Huaxcaleca Nahuatl | nhq-000 | ckw~i* |
| Cuaiquer | kwi-000 | Ckwil |
| English | eng-000 | C. K. Williams |
| français | fra-000 | C.K. Williams |
| Hulʼqʼumiʼnumʼ | hur-001 | c=kʷím |
| Hulʼqʼumiʼnumʼ | hur-001 | ckw~im |
| Halkomelem | hur-002 | ckw~im |
| ASCII Upriver Halkomelem | hur-004 | ckw~im |
| Náhuatl de Chilacachapa Cuetzala del Progreso | naz-000 | ckw~in |
| Náhuatl de Huitziltepec Zumpango del Rio | ngu-002 | ckw~in |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ čaʔ siʔi |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ kiʔʸa |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ lo kitʸi |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ loʔo |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ mnã |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ ska čaʔ |
| Cha7³¹ tinyan³ | ctz-000 | čkʷiʔ s-la |
| Yavapai | yuf-002 | Ckw~o |
| xʷsenəčqən | str-000 | čk̕ʷən |
| nəxʷsƛ̕ay̕əmúcən | clm-000 | čk̕ʷə́n̕ |
| Abaza | abq-001 | čʼkʼʷən |
| xʷsenəčqən | str-000 | č̕kʷəx̣t |
| nəxʷsƛ̕ay̕əmúcən | clm-000 | č̕kʷə́x̣t |
| nəxʷsƛ̕ay̕əmúcən | clm-000 | č̕kʷə́x̣ən |
| ISO 639-3 | art-001 | ckx |
| filename extensions | art-335 | ckx |
| ISO 639-PanLex | art-274 | ckx-000 |
| ISO 639-PanLex | art-274 | ckx-001 |
| ISO 639-PanLex | art-274 | ckx-002 |
| Proto-Taa | nmn-003 | *ckxâjV |
| !Xóõ | nmn-000 | ckxâye |
| Ekoka-ǃXû | knw-000 | čkxáŋ |
| TechTarget file types | art-336 | CKX-ChucK-Plug-in-ChucK-Team |
| English | eng-000 | CKXL-FM |
| français | fra-000 | CKXL-FM |
| Proto-North Khoisan | khi-003 | *ckxúŋ́ |
| dansk | dan-000 | CKY |
| Deutsch | deu-000 | CKY |
| English | eng-000 | CKY |
| suomi | fin-000 | CKY |
| français | fra-000 | CKY |
| italiano | ita-000 | CKY |
| Nederlands | nld-000 | CKY |
| bokmål | nob-000 | CKY |
| polski | pol-000 | CKY |
| slovenščina | slv-000 | CKY |
| svenska | swe-000 | CKY |
| ISO 639-3 | art-001 | cky |
| ISO 639-PanLex | art-274 | cky-000 |
| Kwikapa | coc-000 | ckyaw |
| Yavapai | yuf-002 | Cky~o |
| Yavapai | yuf-002 | č=kʸˈo |
| ISO 639-3 | art-001 | ckz |
| filename extensions | art-335 | ckz |
| ISO 639-PanLex | art-274 | ckz-000 |
| TechTarget file types | art-336 | CKZ-QuickSFV-file-verification-database |
| Thavung | thm-000 | ckǝǝl² |
| Cheʼ Wong | cwg-000 | ckɑt |
| Gününa Küne | pue-000 | -c̷kɨ |
| Gününa Küne | pue-000 | -c̷kɨnɨ |
| français | fra-000 | $CL |
| English | eng-000 | C.L. |
| ISO 3166 alpha | art-006 | CL |
| List of Glossing Abbreviations | art-306 | CL |
| Unicode Property Value Aliases | art-318 | CL |
| Deutsch | deu-000 | CL |
| English | eng-000 | CL |
| Gaeilge | gle-000 | CL |
| bahasa Indonesia | ind-000 | CL |
| íslenska | isl-000 | CL |
| italiano | ita-000 | CL |
| bokmål | nob-000 | CL |
| português | por-000 | CL |
| Türkçe | tur-000 | CL |
| العربية | arb-000 | CL$ |
| Afrikaans | afr-000 | Cl |
| atomic symbols | art-010 | Cl |
| ISO 80000-9 Annex A | art-255 | Cl |
| čeština | ces-000 | Cl |
| Deutsch | deu-000 | Cl |
| eesti | ekk-000 | Cl |
| English | eng-000 | Cl |
| suomi | fin-000 | Cl |
| français | fra-000 | Cl |
| galego | glg-000 | Cl |
| hrvatski | hrv-000 | Cl |
| magyar | hun-000 | Cl |
| italiano | ita-000 | Cl |
| 日本語 | jpn-000 | Cl |
| Nederlands | nld-000 | Cl |
| polski | pol-000 | Cl |
| português | por-000 | Cl |
| русский | rus-000 | Cl |
| slovenčina | slk-000 | Cl |
| español | spa-000 | Cl |
| català | cat-000 | Cl- |
| English | eng-000 | Cl- |
| español | spa-000 | Cl- |
| latine | lat-000 | c. l. |
| toskërishte | als-000 | cL |
| asturianu | ast-000 | cL |
| বাংলা | ben-000 | cL |
| bosanski | bos-000 | cL |
| Cymraeg | cym-000 | cL |
| ελληνικά | ell-000 | cL |
| English | eng-000 | cL |
| Canadian English | eng-008 | cL |
| Australian English | eng-009 | cL |
| Wikang Filipino | fil-000 | cL |
| français canadien | fra-012 | cL |
| Gàidhlig | gla-000 | cL |
| Gaeilge | gle-000 | cL |
| עברית | heb-000 | cL |
| bahasa Indonesia | ind-000 | cL |
| ភាសាខ្មែរ | khm-000 | cL |
| 한국어 | kor-000 | cL |
| ລາວ | lao-000 | cL |
| Lëtzebuergesch | ltz-000 | cL |
| मराठी | mar-000 | cL |
| македонски | mkd-000 | cL |
| नेपाली | npi-000 | cL |
| polski | pol-000 | cL |
| slovenščina | slv-000 | cL |
| српски | srp-000 | cL |
| srpski | srp-001 | cL |
| svenska | swe-000 | cL |
| tiếng Việt | vie-000 | cL |
| Bahasa Malaysia | zsm-000 | cL |
| isiZulu | zul-000 | cL |
| filename extensions | art-335 | cl |
| brezhoneg | bre-000 | cl |
| български | bul-000 | cl |
| català | cat-000 | cl |
| čeština | ces-000 | cl |
| dansk | dan-000 | cl |
| Deutsch | deu-000 | cl |
| dolnoserbska reč | dsb-000 | cl |
| eesti | ekk-000 | cl |
| English | eng-000 | cl |
| Esperanto | epo-000 | cl |
| euskara | eus-000 | cl |
| føroyskt | fao-000 | cl |
| suomi | fin-000 | cl |
| français | fra-000 | cl |
| Gaeilge | gle-000 | cl |
| galego | glg-000 | cl |
| hrvatski | hrv-000 | cl |
| hornjoserbšćina | hsb-000 | cl |
| magyar | hun-000 | cl |
| íslenska | isl-000 | cl |
| italiano | ita-000 | cl |
| kriolu kabuverdianu | kea-000 | cl |
| lietuvių | lit-000 | cl |
| latviešu | lvs-000 | cl |
| Nederlands | nld-000 | cl |
| bokmål | nob-000 | cl |
| polski | pol-000 | cl |
| português | por-000 | cl |
| română | ron-000 | cl |
| slovenčina | slk-000 | cl |
| slovenščina | slv-000 | cl |
| español | spa-000 | cl |
| svenska | swe-000 | cl |
| Türkçe | tur-000 | cl |
| English | eng-000 | cl. |
| español | spa-000 | cl. |
| filename extensions | art-335 | cl_ |
| Afrikaans | afr-000 | cℓ |
| English | eng-000 | CL0 |
| English | eng-000 | CL100 |
| English | eng-000 | Cl2 |
| français | fra-000 | Cl2 |
| español | spa-000 | Cl2 |
| filename extensions | art-335 | cl2 |