var lang ; if ( navigator && navigator . userAgent && ( lang = navigator . userAgent . match ( /android.*\W(\w\w)-(\w\w)\W/ i ))) { lang = lang [ 1 ]; } if (! lang && navigator ) { if ( navigator . language ) { lang = navigator . language ; } else if ( navigator . browserLanguage ) { lang = navigator . browserLanguage ; } else if ( navigator . systemLanguage ) { lang = navigator . systemLanguage ; } else if ( navigator . userLanguage ) { lang = navigator . userLanguage ; } lang = lang . substr ( 0 , 2 ); }