language.json

{
    "type": "string",
    "description": "The [language tag](https://tools.ietf.org/html/bcp47#section-2) for the language in which to localize the error-related strings, such as messages, issues, and suggested actions. The tag is made up of the [ISO 639-2 language code](https://www.loc.gov/standards/iso639-2/php/code_list.php), the optional [ISO-15924 script tag](https://www.unicode.org/iso15924/codelists.html), and the [ISO-3166 alpha-2 country code](/api/rest/reference/country-codes/).",
    "format": "paypal_common_language_v1",
    "maxLength": 10,
    "minLength": 2,
    "pattern": "^[a-z]{2}(?:-[A-Z][a-z]{3})?(?:-(?:[A-Z]{2}))?$"
}