| Hànyǔ | cmn-003 | X she4 xian4 yan3 she4 fen1 xi1 |
| Hànyǔ | cmn-003 | X she4 xian4 yan3 she4 hua1 yang4 |
| Hànyǔ | cmn-003 | X she4 xian4 ying2 guang1 guang1 pu3 yi2 |
| Uyghurche | uig-001 | x shekillik bix ulaq |
| Uyghurche | uig-001 | x shekillik kesme yüz |
| Uyghurche | uig-001 | x shekillik lim |
| Uyghurche | uig-001 | x shekillik polat |
| Uyghurche | uig-001 | x shekillik qozuq |
| Uyghurche | uig-001 | x shekillik yéteklesh-egishish qurulmisi |
| Hànyǔ | cmn-003 | X shè xiàn |
| Hànyǔ | cmn-003 | X shè xiàn jiǎn chá jī |
| Hànyǔ | cmn-003 | X shè xiàn shè pǔ yí |
| Hànyǔ | cmn-003 | X shè xiàn yǎn shè |
| Hànyǔ | cmn-003 | X shè xiàn yǎn shè yí |
| Old Avestan | ave-001 | xshi |
| English | eng-000 | X-shift |
| Old Avestan | ave-001 | xshmâvañt |
| Old Avestan | ave-001 | xshmâvatô |
| Old Avestan | ave-001 | xshnaoma |
| Old Avestan | ave-001 | xshnaothra |
| Old Avestan | ave-001 | xshnaothrâica |
| Old Avestan | ave-001 | xshnâvayeiti |
| Old Avestan | ave-001 | xshnu |
| Old Avestan | ave-001 | xshnûmaine |
| Old Avestan | ave-001 | xshnûman |
| Old Avestan | ave-001 | xshnûta |
| Old Avestan | ave-001 | xshnûtå |
| Old Avestan | ave-001 | xshnûtô |
| Old Avestan | ave-001 | xshôithnî |
| Old Avestan | ave-001 | xshôithnîm |
| Ichishkíin Sɨ́nwit | yak-000 | xshtú |
| Old Avestan | ave-001 | xshtûm |
| Old Avestan | ave-001 | xshtva |
| Old Avestan | ave-001 | xshtvô |
| Old Avestan | ave-001 | xshudra |
| Old Avestan | ave-001 | xshudrå |
| TechTarget file types | art-336 | XS-Hummingbird-Exceed-File |
| Old Avestan | ave-001 | xshvash |
| Old Avestan | ave-001 | xshvashti |
| Old Avestan | ave-001 | xshvashtîm |
| Perge Tegu | djm-004 | X sí: |
| lagwan | kot-000 | Xs~i |
| ISO 639-3 | art-001 | xsi |
| filename extensions | art-335 | xsi |
| Luhua | cng-006 | xsi |
| Peace Corps 2007 Tamazight | tzm-009 | xsi |
| Old Avestan | ave-001 | xši- |
| Old Avestan | ave-001 | xšī |
| ISO 639-PanLex | art-274 | xsi-000 |
| Heiltsuk | hei-000 | xsia |
| filename extensions | art-335 | xsiaddon |
| TechTarget file types | art-336 | XSIADDON-SOFTIMAGE-XSI-add-on-file |
| dižəʼəxon | zav-000 | xšib |
| A@Side-PalmForward S@Side-PalmForward L@Side-PalmForward | ase-000 | X@SideChinhigh-X@SideChinhigh CirclesHoriz-CirclesHoriz |
| English | eng-000 | X signal |
| English | eng-000 | x signal |
| suomi | fin-000 | X-siipinen |
| Tsimshian | tsi-000 | xsiit |
| Bangi | bni-000 | xsika |
| Goukou | cng-004 | xsiko |
| English | eng-000 | XSIL |
| português | por-000 | XSIL |
| dižəʼəxon | zav-000 | Xšil |
| dižəʼəxon | zav-000 | xsil |
| dižaʼxon | zpq-000 | xsil |
| dižəʼəxon | zav-000 | xšil |
| dižəʼəxon | zav-000 | xšin |
| català | cat-000 | X Singles |
| English | eng-000 | X Singles |
| 日本語 | jpn-000 | X Singles |
| dižəʼəxon | zav-000 | xšinḻaz |
| dižaʼxon | zpq-000 | xšinḻaz |
| dižəʼəxon | zav-000 | xsinš |
| arevelahayeren | hye-002 | xsir |
| hyw-001 | xsir | |
| TechTarget file types | art-336 | XSI-Softimage-XSI-3D-Image |
| TechTarget file types | art-336 | XSI-SOFTIMAGE-XSI-3D-model |
| TechTarget file types | art-336 | XSI-Softimage-XSI-3D-Model-Avid-Technology-Inc |
| English | eng-000 | xsistor |
| Luoxiang | cng-007 | xsisu mæʁzə |
| dižəʼəxon | zav-000 | XSit |
| dižəʼəxon | zav-000 | xšit |
| Tsimshian | tsi-000 | xsiwoox |
| dižəʼəxon | zav-000 | xsiy |
| nàŋ-dàmá | nzz-000 | X síyé |
| Togo-Kan | dtk-002 | [X síyɛ́ tɛ̀] |
| Togo-Kan | dtk-002 | [X síyɛ́ tɛ̀] yě |
| ISO 639-3 | art-001 | xsj |
| ISO 639-3 Retired Code Elements | art-324 | xsj |
| ISO 639-PanLex | art-274 | xsj-000 |
| Limburgs | lim-000 | X-sjtraole |
| Limburgs | lim-000 | x-sjtraole |
| ISO 639-3 Retired Code Elements | art-324 | xsk |
| Tsimshian | tsi-000 | xskˀaanaxs |
| SPDX License List Identifier | art-298 | XSkat |
| English | eng-000 | XSkat License |
| Peace Corps 2007 Tamazight | tzm-009 | xs km |
| العربية | arb-000 | XSL |
| català | cat-000 | XSL |
| 普通话 | cmn-000 | XSL |
| dansk | dan-000 | XSL |
| Deutsch | deu-000 | XSL |
| ελληνικά | ell-000 | XSL |
| English | eng-000 | XSL |
| euskara | eus-000 | XSL |
| français | fra-000 | XSL |
| עברית | heb-000 | XSL |
| íslenska | isl-000 | XSL |
| italiano | ita-000 | XSL |
| 日本語 | jpn-000 | XSL |
| кыргыз | kir-000 | XSL |
| Hangungmal | kor-001 | XSL |
| Makedonski jazik | mkd-001 | XSL |
| Nederlands | nld-000 | XSL |
| nynorsk | nno-000 | XSL |
| bokmål | nob-000 | XSL |
| پښتو ژبه | pbu-000 | XSL |
| فارسی | pes-000 | XSL |
| polski | pol-000 | XSL |
| português | por-000 | XSL |
| русский | rus-000 | XSL |
| slovenčina | slk-000 | XSL |
| español | spa-000 | XSL |
| svenska | swe-000 | XSL |
| tatar tele | tat-000 | XSL |
| Türkçe | tur-000 | XSL |
| اردو | urd-000 | XSL |
| tiếng Việt | vie-000 | XSL |
| Bahasa Malaysia | zsm-000 | XSL |
| ISO 639-3 | art-001 | xsl |
| filename extensions | art-335 | xsl |
| suomi | fin-000 | xsl |
| português | por-000 | xsl |
| português brasileiro | por-001 | xsl |
| português europeu | por-002 | xsl |
| español | spa-000 | xsl |
| ISO 639-PanLex | art-274 | xsl-000 |
| ISO 639-PanLex | art-274 | xsl-001 |
| suomi | fin-000 | XSL (Extensible Stylesheet Language) |
| Hangungmal | kor-001 | XSL(Extensible Stylesheet Language) |
| TechTarget file types | art-336 | XSL-FileMaker-Database-Design-Report-Template |
| 普通话 | cmn-000 | XSL-FO |
| 國語 | cmn-001 | XSL-FO |
| euskara | eus-000 | XSL-FO |
| suomi | fin-000 | XSL-FO |
| français | fra-000 | XSL-FO |
| íslenska | isl-000 | XSL-FO |
| italiano | ita-000 | XSL-FO |
| русский | rus-000 | XSL-FO |
| español | spa-000 | XSL-FO |
| svenska | swe-000 | XSL-FO |
| English | eng-000 | xslfo |
| English | eng-000 | XSL-FO Form |
| English | eng-000 | XSL-FO Formatted Form |
| English | eng-000 | XSL-FO Online Form |
| English | eng-000 | XSL Formatting Objects |
| 日本語 | jpn-000 | XSL Formatting Objects |
| Nederlands | nld-000 | XSL Formatting Objects |
| polski | pol-000 | XSL Formatting Objects |
| filename extensions | art-335 | xslic |
| TechTarget file types | art-336 | XSL-Steuer2001-File |
| bosanski | bos-000 | XSLT |
| català | cat-000 | XSLT |
| čeština | ces-000 | XSLT |
| 普通话 | cmn-000 | XSLT |
| 國語 | cmn-001 | XSLT |
| Hànyǔ | cmn-003 | XSLT |
| dansk | dan-000 | XSLT |
| Deutsch | deu-000 | XSLT |
| English | eng-000 | XSLT |
| Esperanto | epo-000 | XSLT |
| euskara | eus-000 | XSLT |
| suomi | fin-000 | XSLT |
| français | fra-000 | XSLT |
| Gaeilge | gle-000 | XSLT |
| ISO 259-3 | heb-001 | XSLT |
| magyar | hun-000 | XSLT |
| interlingua | ina-000 | XSLT |
| bahasa Indonesia | ind-000 | XSLT |
| íslenska | isl-000 | XSLT |
| italiano | ita-000 | XSLT |
| 日本語 | jpn-000 | XSLT |
| Nihongo | jpn-001 | XSLT |
| Kurmancî | kmr-000 | XSLT |
| Hangungmal | kor-001 | XSLT |
| lietuvių | lit-000 | XSLT |
| Nederlands | nld-000 | XSLT |
| bokmål | nob-000 | XSLT |
| polski | pol-000 | XSLT |
| português | por-000 | XSLT |
| română | ron-000 | XSLT |
| русский | rus-000 | XSLT |
| russkij | rus-001 | XSLT |
| Žemaitiu | sgs-000 | XSLT |
| slovenčina | slk-000 | XSLT |
| slovenščina | slv-000 | XSLT |
| español | spa-000 | XSLT |
| srpski | srp-001 | XSLT |
| svenska | swe-000 | XSLT |
| phasa thai | tha-001 | XSLT |
| Türkçe | tur-000 | XSLT |
| Latynytsia | ukr-001 | XSLT |
| tiếng Việt | vie-000 | XSLT |
| filename extensions | art-335 | xslt |
| TechTarget file types | art-336 | XSLT-Extensible-Style-sheet-Language-Transformation-file |
| Hangungmal | kor-001 | XSLT(Extensible Stylesheet Language Transformations) |
| Deutsch | deu-000 | XSL Transformation |
| English | eng-000 | XSL Transformation |
| Deutsch | deu-000 | XSL-Transformation |
| English | eng-000 | XSL Transformation File |
| English | eng-000 | XSL Transformations |
| italiano | ita-000 | XSL Transformations |
| 日本語 | jpn-000 | XSL Transformations |
| polski | pol-000 | XSL Transformations |
| українська | ukr-000 | XSL Transformations |
| English | eng-000 | XSL transform file |
| TechTarget file types | art-336 | XSLT-XSL-Transformation |
| TechTarget file types | art-336 | XSLT-XSL-transform-file |
| português | por-000 | xslx |
| português brasileiro | por-001 | xslx |
| português europeu | por-002 | xslx |
| español | spa-000 | xslx |
| TechTarget file types | art-336 | XSL-XML-Style-Sheet |
| TechTarget file types | art-336 | XSL-XML-Stylesheet |
| ISO 639-3 | art-001 | xsm |
| filename extensions | art-335 | xsm |
| ISO 639-PanLex | art-274 | xsm-000 |
| Deutsch | deu-000 | XSM-73 Goose |
| English | eng-000 | XSM-73 Goose |
| italiano | ita-000 | XSM-73 Goose |
| English | eng-000 | x-small |
| Peace Corps 2007 Tamazight | tzm-009 | xs mc |
| TechTarget file types | art-336 | XSM-eXtra-Simple-Music-file |
| Deutsch | deu-000 | X-Smiles |
| English | eng-000 | X-Smiles |
| français | fra-000 | X-Smiles |
| TechTarget file types | art-336 | XSM-LEXIS-NEXIS-Tracker |
| TechTarget file types | art-336 | XSM-SimCity-Societies-game-file |
| ISO 639-3 | art-001 | xsn |
| ISO 639 | art-005 | xsn |
| filename extensions | art-335 | xsn |
| ISO 639-PanLex | art-274 | xsn-000 |
| Old Avestan | ave-001 | xšnā |
| Avestan | ave-000 | xṣ̌naoθrāica |
| Old Avestan | ave-001 | xšnav |
| TechTarget file types | art-336 | XSN-Form-Template-File |
| Kurmancî | kmr-000 | x+*snhka+* |
| TechTarget file types | art-336 | XSN-InfoPath-Dynamic-Form-Template-Microsoft-Corporation |
| TechTarget file types | art-336 | XSN-Microsoft-Office-InfoPath-file |
| Old Avestan | ave-001 | xsnu |
| TechTarget file types | art-336 | XSN-xyALGEBRA-file |
| ISO 639-3 | art-001 | xso |
| Barbareño | boi-000 | xšoˀ |
| Togo-Kan | dtk-002 | [X só:] bɛ̀rɛ́ |
| dižəʼəxon | zav-000 | xsod |
| Beni | djm-003 | X--sò-lô: |
| ISO 12620 | art-317 | xSource |
| English | eng-000 | X++ Source Code File |
| TechTarget file types | art-336 | X-Source-code-file-Lex |
| English | eng-000 | XSP |
| português | por-000 | XSP |
| русский | rus-000 | XSP |
| español | spa-000 | XSP |
| français | fra-000 | Xsp |
| ISO 639-3 | art-001 | xsp |
| filename extensions | art-335 | xsp |
| ISO 639-PanLex | art-274 | xsp-000 |
| TechTarget file types | art-336 | XSP-Autodesk-existing-ground-section-data-pointer-file |
| TechTarget file types | art-336 | XSP-Cross-Stitch-Professional-Design-File-DP-Software |
| TechTarget file types | art-336 | XS-Perl-xsub-File-Produced-by-h2xs |
| français | fra-000 | XSPF |
| español | spa-000 | XSPF |
| filename extensions | art-335 | xspf |
| English | eng-000 | XSPF Playlist |
| English | eng-000 | XSPF Playlist File |
| TechTarget file types | art-336 | XSPF-Shareable-Playlist-Format-XML |
| TechTarget file types | art-336 | XSPF-XML-Shareable-Playlist-Format |
| TechTarget file types | art-336 | XSPF-XSPF-Playlist-Xiph-Org-Foundation |
| English | eng-000 | X-spread |
| English | eng-000 | X-spring |
| ISO 639-3 | art-001 | xsq |
| ISO 639-PanLex | art-274 | xsq-000 |
| filename extensions | art-335 | xsql |
| TechTarget file types | art-336 | XSQL-Oracle-XSQL-Servlet-XSQL-Template-File-Oracle-Corporation |
| English | eng-000 | x-squard |
| English | eng-000 | x squared |
| ISO 639-3 | art-001 | xsr |
| filename extensions | art-335 | xsr |
| Peace Corps 2007 Tamazight | tzm-009 | xsr |
| ISO 639-PanLex | art-274 | xsr-000 |
| ISO 639-PanLex | art-274 | xsr-001 |
| ISO 639-PanLex | art-274 | xsr-002 |
| TechTarget file types | art-336 | XSR-Fabtrol-MRP-file |
| TechTarget file types | art-336 | XSR-GEOPAK-XS-List-report |
| ISO 639-3 | art-001 | xss |
| filename extensions | art-335 | xss |
| ISO 639-PanLex | art-274 | xss-000 |
| Peace Corps 2007 Tamazight | tzm-009 | xssa |
| TechTarget file types | art-336 | XSS-Ability-Office-Spreadsheet |