Provide language param for widgets calls to select the language to show reports #835

I have integrated the flash widgets into Drupal reports pages, but I'm not able to show them translated. Please provide a parameter for the API calls that give me the charts back in German or other languages. Something like "language" would be great with ISO values like "de", "fr", etc.

The only string I can get the hands around seems to be "loading", but this doesn't help much if the countries or the word "Others" is shown around a pie charts in English...

(In [2022]) fixes #835 - optional language param to select translation