I live in Catalonia (Spain) and I speak both Catalan and Spanish. Also some French. Now I am learning English. Sometimes I feel languages as a curse, sometimes as a blessing. They say that each language gives us a vision of the world. Is this diversity so important? If you had a button able to make all languages disappear except one, if we could wake up tomorrow knowing all this language and forgetting about others, would you press the button?
Well General Franco pressed that button and imposed Spanish to Catalans.
I find your question weird! Would you abolish at the same time all the differences between people. No green eyed people. No blond, only black hair, no whites only blacks? How boring.