I couldn't find it from a quick search... Do you know if this tool supports non English languages (specifically greek)? Also why idea if it also supports stemmi

I couldn't find it from a quick search... Do you know if this tool supports non English languages (specifically greek)? Also why idea if it also supports stemming for these i.e I would like to search for σκύλος (=dog) and get documents having σκύλων (=dogs).