Template talk:Script/Slavonic

Lang

The documentation says:

Valid language codes

• Old Church Slavonic cu or chu (default)
• Church Slavonic cu or chu (default)

However if I leave the language slot empty, it doesn't emit an HTML lang attribute. Shouldn't it emit lang="cu-Cyrs"? Shouldn't it emit the -Cyrs script tag for all languages? Test:

• {{Slavonic|аблъко}} аблъко
• {{Slavonic|cu|аблъко}} аблъко
• {{Slavonic|cu-Cyrs|аблъко}} аблъко

--Error (talk) 23:57, 25 May 2021 (UTC)