The 20 «bt» files are bitexts created with LogiTerm from the TM in .tmx format.
The «Wf» file (Wf-AcqComEN2ES.7z) is a TM in Wordfast format (zipped with 7-zip).
As of November 2007, the European Commission’s Directorate General for Translation (DGT) made publicly accessible its multilingual Translation Memory for the Acquis Communautaire (the body of EU law) – a collection of parallel texts (texts and their translation, also referred to as bi-texts) in 22 languages.