jaとかenとか、頭2文字返してくれる。
/**
* ブラウザの言語設定
*
* @return 言語設定
*
*/
var getLanguage = (function(){
try{
return (navigator.browserLanguage || navigator.language || navigator.userLanguage).substr(0,2);
}catch(e){
return undefined;
}
})();
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