Interestingly it's now quite similar in number to Catalan, which after all these years is still not an official EU language despite being spoken by ~10M people (~4M natively) in multiple countries.
All Spaniards can speak Spanish according to Spanish Constitution.
Thus, Catalan is a regional language. If the EU should have to provide translations and material in each of the regional languages, the cost of coding laws would be quite a bit high.
