I'm using Avogadro in Kubuntu 13.04. I live in Turkey but use my OS in English. Kde language preferences shows a single language chosen that is En_US. But somehow Avogadro comes in Turkish upon its launch. The only things about Turkey is country and timezone preferences in KDE system settings. Although I changed those to US as well, Avogadro still launched in Turkish. Sadly there's no way of choosing the language within the program. I think the application should use the default language used in OS.
Thanks in advance.