Localization: Update Wunderground language codes

I have just found a bug in Wunderground language code. Earlier I made an array from the following list:
http://www.wunderground.com/weather/api/d/docs?d=resources/country-to-iso-matching

The new array can be generated from: http://www.wunderground.com/weather/api/d/docs?d=language-support

Now the weather information translates correctly.