Not sure if having to translate the changes strings on the website (http://www.smtube.org/) is worth it for each release.
I translated the string "New option in the context menu to play the video with a web browser." two months ago but its still in english on the website.
Maybe just have a changelog.txt or something in enligsh only that people can choose to open at the end of the installer when updatering like other software if people want to see the changes.