- isLanguageCode(v: unknown): v is "en" | "ca" | "ar" | "fa" | "ps" | "sq" | "hy" | "pt" | "es" | "sm" | "de" | "nl" | "pap" | "sv" | "az" | "bs" | "hr" | "sr" | "bn" | "fr" | "bg" | "rn" | "ms" | "qu" | "ay" | "dz" | "tn" | "be" | "ru" | "sg" | "it" | "zh" | "el" | "tr" | "cs" | "da" | "et" | "am" | "fi" | "hif" | "fj" | "fo" | "ka" | "kl" | "ch" | "ht" | "hu" | "id" | "ga" | "he" | "gv" | "hi" | "is" | "ja" | "sw" | "ky" | "km" | "gil" | "zdj" | "wni" | "ko" | "kk" | "lo" | "si" | "ta" | "st" | "lt" | "lb" | "lv" | "tzm" | "ro" | "mg" | "mh" | "mk" | "my" | "mn" | "mt" | "dv" | "ny" | "vec" | "yo" | "nb" | "no" | "nn" | "ne" | "na" | "niu" | "mi" | "ty" | "tpi" | "ho" | "fil" | "ur" | "pl" | "pau" | "gn" | "rw" | "sl" | "sk" | "so" | "ss" | "th" | "tg" | "tkl" | "tet" | "tk" | "to" | "tvl" | "uk" | "haw" | "uz" | "vi" | "bi" | "sn" | "nd"
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Returns v is "en" | "ca" | "ar" | "fa" | "ps" | "sq" | "hy" | "pt" | "es" | "sm" | "de" | "nl" | "pap" | "sv" | "az" | "bs" | "hr" | "sr" | "bn" | "fr" | "bg" | "rn" | "ms" | "qu" | "ay" | "dz" | "tn" | "be" | "ru" | "sg" | "it" | "zh" | "el" | "tr" | "cs" | "da" | "et" | "am" | "fi" | "hif" | "fj" | "fo" | "ka" | "kl" | "ch" | "ht" | "hu" | "id" | "ga" | "he" | "gv" | "hi" | "is" | "ja" | "sw" | "ky" | "km" | "gil" | "zdj" | "wni" | "ko" | "kk" | "lo" | "si" | "ta" | "st" | "lt" | "lb" | "lv" | "tzm" | "ro" | "mg" | "mh" | "mk" | "my" | "mn" | "mt" | "dv" | "ny" | "vec" | "yo" | "nb" | "no" | "nn" | "ne" | "na" | "niu" | "mi" | "ty" | "tpi" | "ho" | "fil" | "ur" | "pl" | "pau" | "gn" | "rw" | "sl" | "sk" | "so" | "ss" | "th" | "tg" | "tkl" | "tet" | "tk" | "to" | "tvl" | "uk" | "haw" | "uz" | "vi" | "bi" | "sn" | "nd"