Editing ISO 639 (section)

===Two-letter code space===
Two-letter (formerly "Alpha-2") identifiers (for codes composed of 2 letters of the [[ISO basic Latin alphabet]]) are used in [[ISO 639-1|Set 1]]. When codes for a wider range of languages were desired, more than 2 letter combinations could cover (a maximum of 26<sup>2</sup> = 676), [[ISO 639-2|Set 2]] was developed using three-letter codes. (However, the latter was formally published first.<ref>{{cite web|title=Codes for the representation of names of languages -- Part 2: Alpha-3 code|url=https://www.iso.org/standard/4767.html|website=International Organization for Standards|publisher=ISO|access-date=10 January 2019|quote=Publication date : 1998-10}}</ref><ref>{{cite web|title=Codes for the representation of names of languages -- Part 1: Alpha-2 code|url=https://www.iso.org/standard/22109.html|website=International Organization for Standards|publisher=ISO|access-date=15 February 2018|quote=Publication date : 2002-07}}</ref>)