Editing OpenType (section)

===Language system tags===
[[File:Cyrillic cursive.svg|thumb|150px|Variations in Cyrillic cursive. Letters in same row have the same code point.]]

Language system tags identify the language systems supported in an OpenType font. Examples include <code>ARA</code> for [[Arabic language|Arabic]], <code>ESP</code> for [[Spanish language|Spanish]], <code>HYE</code> for [[Armenian language|Armenian]], etc. In general, the codes are not the same as [[ISO 639-2]] codes.<ref name=ots-ltags>{{cite web |url=https://learn.microsoft.com/en-us/typography/opentype/spec/languagetags |title=Language System Tags |department=Microsoft Typography |website=[[Microsoft Learn]] |access-date=2024-04-13}}</ref>

These tags can be used to select local variants of letters that share a single Unicode code point.<ref name=ots-ltags /><ref name=ots-feat-ko>{{Cite web |url=https://learn.microsoft.com/en-us/typography/opentype/spec/features_ko |title=Registered Features: Definitions and Implementations (k – o) |department=Microsoft Typography |website=[[Microsoft Learn]] |access-date=2024-04-13}}</ref> For instance, the [[Serbian Cyrillic alphabet|Serbian and Macedonian Cyrillic]] alphabet has some language-specific glyphs for certain letters, which are only preferred and are not strictly mandated.{{citation needed|date=January 2024}}