Maria Kihlstedt, psycholinguist and lecturer at the University Paris-X, answers this question in the magazine Human Sciences: bilingualism is it an asset?
... Increasing mobility of people, mixed cultural marriages and the political will to introduce an earlier living language into schools - and two living languages before entering the sixth grade according to the recommendation of the European Commission - make that many children today are confronted very early with several languages.
Read more in this French article here.