Sometimes our friends may be from different countries and they may try to contact you in their own language. At that time you must reply in the same language to show your caringness, This often happens at Orkut and Facebook. In some other cases your blog may get Comments in Different languages (As i got in NEW USB3.0 SUPPORTIVE H55 AND H57 MOTHERBOARDS LAUNCHED BY GIGABYTE ). They are leaving comments in their own language, because they don't know English. So we must Leave Comments in their own languages to maintain the readers.
It's very simple to deal. The method i propose here is to use Google Translator. Because in those situations i am helped by Google Translator. Simply Go to http://translate.google.com/ and select the target and source languages then type the words to translate. Google is always best.