Google Fonts Functions

    // Google fonts
    function consult_google_fonts() {
        $fonts_url = '';

        $OpenSans = _x('on', 'OpenSans font: on or off', 'consult');
        $Montserrat = _x('on', 'Montserrat font: on or off', 'consult');

        if ('off' !== $OpenSans || 'off' !== $Montserrat) {
            $font_families = array();

            if ('off' !== $OpenSans) {
                $font_families[] = 'OpenSans:300i,400,400i,600,700,800';
            }

            if ('off' !== $Montserrat) {
                $font_families[] = 'Montserrat:200,300,400,500,600,700,800,900';
            }
        }

        $query_args = array(
            'family' => urlencode( implode( '|', $font_families ) ),
            // 'subset' => urlencode('cyrillic-ext,cyrillic', 'vietnamese', 'greek-ext,greek', 'latin,latin-ext'),
            'subset' => urlencode('cyrillic-ext,cyrillic,vietnamese,greek-ext,greek,latin,latin-ext'),
        );

        $fonts_url = add_query_arg($query_args, 'https://fonts.googleapis.com/css');

        return esc_url_raw($fonts_url);
    }