>The purpose of the European Commission is first of all to distribute its own software under the licence
The European Commission is the main executive branch of the European Union. The above sentence is like saying "the purpose of the White House is first of all to distribute software".
This is really just a mistranslation. The author's native language seems to be Spanish. The Spanish word propósito can be translated as "purpose" or "intention." Here, it really means "intention."
[0] : https://en.wikipedia.org/wiki/European_Union_Public_Licence
[1] : https://interoperable-europe.ec.europa.eu/collection/eupl
[2] : https://joinup.ec.europa.eu/sites/default/files/custom-page/...