Our GUI is available in many languages, but translations are not yet completed in alpha 8. Anyway this issue is going to be fixed soon, because now contributing in order to add a new language is very, very easy, since then MakeHuman project is available for translation on Transifex.
Transifex is a web application for localization in an easy and agile way.
If you want to help MakeHuman project translating the GUI in your language, you just need to get a free account on Transifex, then go here: www.transifex.com/projects/p/makehuman/ and start translations using his intuitive interface. You will be also able to download the json file of your language, in order to put it in makehuman/data/languages. Restarting MakeHuman, the new language will be available as setting option.