BCP-47-Tags: 20 curated reference entries.
en-US
en-GB
de-DE
de-AT
de-CH
fr-FR
fr-CA
fr-CH
es-ES
es-MX
es-AR
pt-BR
pt-PT
zh-Hans
zh-Hant
zh-CN
zh-TW
ar-SA
ja-JP
ko-KR