not possible; this immediately solves the problem of competence of laws (something that the GPL does not solve cleanly, except when all parties in a litigation are in the USA). Versions Version 2 was developed after consultations with the French-speaking Linux and Free Software Users' Association, the Association pour la Promotion et la Recherche en Informatique Libre, and the Free Software Foundation; it was released on 21 May 2005. According to the CeCILL FAQ there are no major differences in spirit, though there are in terms. The most notable difference in CeCILL v2 is the fact that the English text was approved not as a draft translation (as in CeCILL v1) but as an authentic text, in addition to the equally authentic French version. This makes the CeCILL license much easier to enforce internationally, as the cost of producing an authentic translation in any international court will be lower with the help of a second authentic reference text. The second difference is that the reference to the GNU General Public License, with which CeCILL v2 is now fully compatible, is explicitly defined precisely using its exact title and the exact name of the Free Software Foundation, to avoid all possible variations of the terms of the GPL v2. Some additional definitions were added to more precisely define the terms with less ambiguity. With these changes, the CeCILL is now fully enforceable according to WIPO rules, and according to French law in courts, without the legal problems remaining in GPL version 2 outside the United States. Version 2.1 was released in June 2013. It allows relicensing to the GNU Affero General Public License and the European Union Public License as well as the GPL, and clarifies the language that requires licensees to give access to the source code (which had previously caused rejection of version 2.0 by the Open Source Initiative). International protection and approbation of the CeCILL licenses Note that CeCILL v1 already allowed replacing a CeCILL v1 license by CeCILL v2, so all software previously licensed with CeCILL v1 in 2004 can be licensed with CeCILL v2, with legal terms enforceable as authentic not only in French but in English too. The fact that it is protected by reputed public research centers (in France the INRIA, a founding member of the international W3 consortium, and the CEA working on atomic energy) which use them to publish their own open-source