language_tags::GRANDFATHERED_REGULAR

pub const GRANDFATHERED_REGULAR: [&'static str; 9] = [
    "art-lojban",
    "cel-gaulish",
    "no-bok",
    "no-nyn",
    "zh-guoyu",
    "zh-hakka",
    "zh-min",
    "zh-min-nan",
    "zh-xiang"]

Contains the 9 regular grandfathered tags having special semantics.