

Because creating a new language, “European”, is going to be perceived as an attack on their identity by a lot of people. It fundamentally changes what “European” means.
Using English or French can be tolerated as a practicality that predates the EU.
This is the most ridiculous part, if they ever try to enforce the license against someone the definition of evil is going to be decided by a court. In that context a humanitarian organization using your software to help Palestinians is more likely to be condemned than a military contractor that kills Palestinians.