Scheme |
Notes |
Examples for English |
Examples for Spanish |
Glottolog codes |
Created for minority languages as a scientific alternative to the industrial ISO 639‑3 standard. Intentionally do not resemble abbreviations. |
- stan1293 – standard English
- macr1271 – macro-English (Modern English, incl. creoles)
- midd1317 – Middle English
- merc1242 – Mercian (Middle to Modern English)
- olde1238 – Old English
- angl1265 – Anglian (Old to Modern English, incl. Scots)
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- stan1288 – standard Spanish
- olds1249 – Old Spanish
- cast1243 – Castilic (Old to Modern Spanish, incl. Extremaduran and creoles)
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IETF language tag |
An IETF best practice, specified by BCP 47,[1] for language tags easy to parse by computer. The tag system is extensible to region, dialect, and private designations. It references ISO 639, ISO 3166 and ISO 15924. |
- en – English, as shortest ISO 639 code.
- en-US – English as used in the United States (US is the ISO 3166‑1 country code for the United States)[1]
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- es – Spanish, as shortest ISO 639 code.
- es-419 – Spanish appropriate for the Latin America and Caribbean region, using the UN M.49 region code
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ISO 639‑1 |
Two-letter code system made official in 2002, containing 136 codes at the time. Many systems use two-letter ISO 639‑1 codes supplemented by three-letter ISO 639‑2 codes when no two-letter code is applicable.
There are 183 two-letter codes registered as of June 2021.
See: List of ISO 639 language codes |
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ISO 639‑2 |
Three-letter system of 464 codes.
See: List of ISO 639-2 codes |
- eng – three-letter code
- enm – Middle English, c. 1100–1500
- ang – Old English, c. 450–1100
- cpe – other English-based creoles and pidgins
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ISO 639‑3 |
An extension of ISO 639‑2 to cover all known, living or dead, spoken or written languages in 7,589 entries.
See: List of ISO 639-3 codes |
- eng – three-letter code
- enm – Middle English, c. 1100–1500
- aig – Antigua and Barbuda Creole English
- ang – Old English, c. 450–1100
- svc – Vincentian Creole English
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- spa – Spanish
- spq – Spanish, Loreto-Ucayali
- ssp – Spanish sign language
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Linguasphere Register code-system |
Two-digit + one to six letter Linguasphere Register code-system published in 2000,[2] containing over 32,000 codes within 10 sectors of reference, covering the world's languages and speech communities. |
Within hierarchy of Linguasphere Register code-system:
- 5= Indo-European phylosector
- 52= Germanic phylozone
- 52-A Germanic set
- 52-AB English + Anglo-Creole chain
- 52-ABA English net
- 52-ABA-c Global English (outer unit)
52-ABA-ca to 52-ABA-cwe (186 varieties)
Compare: 52-ABA-a Scots + Northumbrian outer unit & 52-ABA-b "Anglo-English" outer unit (= South Great Britain traditional varieties + Old Anglo-Irish) |
Within hierarchy of Linguasphere Register code-system:
- 5= Indo-European phylosector
- 51= Romanic phylozone
- 51-A Romance set
- 51-AA Romance chain
- 51-AAA West Romance net
- 51-AAA-b Español/Castellano (outer unit)
51-AAA-ba to 51-AAA-bkk (58 varieties)
Compare: 51-AAA-a Português + Galego outer unit & 51-AAA-c Astur + Leonés outer unit, etc. |
SIL codes (10th–14th editions) |
Codes created for use in the Ethnologue, a publication of SIL International that lists language statistics. The publication now uses ISO 639‑3 codes. |
ENG |
SPN |
Verbix language codes |
Constructed codes starting with old SIL codes and adding more information.[3] |
ENG |
SPN |