This morning I had an email from someone in the ExtJS community letting me know that they’d translated my Extending Ext Components article into German. I had a look and all of my ExtJS articles have been translated into at least one other language. My record is Playing With ExtJS The Easy Way which has been translated into 10 different languages: Deutsch, Chinese, Korean, Japanese, French, Russian, Spanish, Turkish, Portuguese and Hungarian. Page views of the English versions of these articles are just about to tick over the 500,000 mark.
Recently Padre::Plugin::Plack, my Plack (the Perl Web Server) plugin for Padre (the Perl IDE) was translated into Dutch, Brazilian Portuguese and French.
I always get such a buzz when I find out that something I’ve worked on has been translated into another language. It sends a clear message that someone found your work useful enough to go to the effort of translating it so that a new community of people could use it. That’s an awesome form of positive feedback, and a great motivator for being involved in open source software.
Thanks translators!

Indeed.
It is also very encouraging when someone is writing a plug-in to the software you wrote or if someone mentions it in a blog entry!
Thank you!