ElementStacks

HTML

<script src="http://highcharts.com/js/testing.js"></script>
<div id="container" style="height: 400px"></div>

JavaScript

var lang = 'de' // 'en';

if ( lang == 'de') {    
    Highcharts.setOptions({
        xAxis: {
            title: {
                text: 'x-achse'
            }
        }
    });
}
else {
    Highcharts.setOptions({
        xAxis: {
            title: {
                text: 'x-axis'
            }
        }
    });
}
var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container'
    },
    series: [{
        data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
    }]
});