this explanation looks unclear for me. Found it in manual page hunspell(1) ==== -s Stem the words of the input text (see also hunspell(4) about stemming). It depends from the dictionary data. ==== btw i think it should be "depend on" not "depend from" http://dict.leo.org/ende?lp=ende&p=Ci4HO3kMAA&search=depend&trestr=0x8002