LanguageTag
A BCP-47 language tag.
As described in Tags for Identifying Languages, BCP-47_.
.. _Tags for Identifying Languages, BCP-47: https://www.rfc-editor.org/rfc/bcp/bcp47.txt
For example:
"en""en-US""fr-CA""zh-Hant-TW"
Underlying type: string
Constraints
- Allows only
BCP-47_ language tags. (LanguageTagConstraint, pattern:^(?:(?:[A-Za-z]{2,3}(?:-[A-Za-z]{3}){0,3}?)|(?:[A-Za-z]{4,8}))(?:-[A-Za-z]{4})?(?:-[A-Za-z]{2}|[0-9]{3})?(?:-(?:[A-Za-z0-9]{5,8}|[0-9][A-Za-z0-9]{3}))*(?:-[A-WY-Za-wy-z0-9](?:-[A-Za-z0-9]{2,8})+)*$)