Lastly I developed my own language selecting dropdown list.
I created a webpartzone and added a static text and put the below code in its default text.
In my case the languages is predefined and it will not change. So it will work perfectly. If you need to add another language you need to add it to this dropdown manually.

here is the code.

<select id="langSelection" name="langSelection" onchange="window.open(window.location.pathname + '?lang=' + this.options[this.selectedIndex].value,'_top')">
<option value="de-DE">Germany</option>
<option value="en-GB">United Kingdom</option>
<option value="en-US">USA</option>
</select>
<SCRIPT LANGUAGE="JavaScript">
var langSelection=document.getElementById('langSelection');
var lng=document.getElementById('lng');
var lngValue=lng.value;
for(i=0;i<langSelection.length;i++)
{
//alert(langSelection.options.value + ' ' + lngValue);
if(langSelection.options.value==lngValue)
langSelection.selectedIndex=i;
}
</script>