I think it's very important fro the children learn some languages for their communication. Today all people in Catalonia (Spain) talk two languages, Catalan and Spanish. It's very important add other communication forms, so I think in Catalonia the children should learn English and French too. English it's a no Romance language and his structure it's very different from the structure of Catalan or Spanish. So children can learn other rules and other forms of language.
In the case of French, I think this language it's more easy for the children of Catalonia, beacause the rules and forms are very similar between the three languages, Catalan, Spanish and French.