Hummingbrid submited ranked result sets for all 5 monolingual Information Retrieval tasks (German, French, Italian, Spanish and Dutch) of the Cross Language Evaluation Farum CLEF) 2001. Search server's Intuitive searching TM produced the highest average precision score in the German task of the 12 groups submitting automatic, Tiele +Description runs, Enabling stemming in SearchServer increased average precision by 43% in German. 30% in English. All points in the 95% confidence interval for the impact of stemming on average precision in German (based on the twosided WIlcoxon signed rank test ) were greater than all points in the corresponding intervale for French. English and Italian, evidence that stemming in mor beneficial in German than in French English or Italian