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There is movement to make English of legal national language in U.S.A. It is a purpose that restrain Spanish that increasing Hispanic emigrants speak.

However, if U.S.A. makes Spanish of national language, they will have more profit in future.
Huge population is necessary to stand against China and India. If it adopts Spanish, U.S.A. can become a center unifying markets of the Americas.

Switch of idea is sometimes necessary to maintain prosperity.