TreeTagger - a part-of-speech tagger for many languages - lemmatization

It looks like a great tool but not one that could be invoked natively from RapidMiner.  You could likely use it separately on your source data though and then send the resulting text into RapidMiner for subsequent analysis.

Hey there, thank you for your answer.
could it be possible to design a loop rapid miner (write excel, execute python, etc)?

Certainly---almost anything is possible in RapidMiner if you are willing to incorporate R or Python or SQL scripts---but you are probably mostly on your own with that, as there is not likely an existing process that someone in the community can share with you to do it.  Efforts here tend to mostly be around use of operators and processes native to RapidMiner.