nl_tokens: Returns an array where all locales are canonicalized and duplicates removed . Throws on locales that are not well formed BCP47 tags .
pl_tokens: function initializeLocaleList ( locales ) { var seen = new InternalArray ( ) ; if ( ! IS_UNDEFINED ( locales ) ) { // We allow single string localeID. if ( typeof locales === 'string' ) { % _Call ( ArrayPush , seen , canonicalizeLanguageTag ( locales ) ) ; return freezeArray ( seen ) ; } var o = TO_OBJECT ( locales ) ; var len = TO_UINT32 ( o . length ) ; for ( var k = 0 ; k < len ; k ++ ) { if ( k <mask> o ) { var value = o [ k ] ; var tag = canonicalizeLanguageTag ( value ) ; if ( % _Call ( ArrayIndexOf , seen , tag ) === - 1 ) { % _Call ( ArrayPush , seen , tag ) ; } } } } return freezeArray ( seen ) ; }