Eurospider participated in both the multilingual and monolingual retrieval tasks for CLEF 2001. Our multilingual experiments, the main focus of this year's work. Combine multiple approaches to cross-language retrieval of machine translation, similarity thesauri, and machine-readable dictionaries. We monolingual experiment focused on the use of two fundamentally different stemming componenets: a stemmer based on commercial consideration, and a linguistically motivated stemmer