The European languages are members of the same family. Their separate existence is a myth. For science, music, sport, etc, Europe uses the same vocabulary.
The languages only differ in their grammar, their pronunciation and their most common words. Everyone realizes why a new common language would be desirable: one could refuse to pay expensive translators.
The new common language will be more simple and regular than the existing European languages. It will be as simple as Occidental; in fact, it will be Occidental.