English: Constantino became very active in participating in two constitutional conventions (1971–1972 and 1986), where one of the most important issues tackled was the provision on national language.
Filipino: Lubusang naging aktibo si Constantino sa pakikibahagi sa dalawang kumbensiyong konstitusyonal (1971–1972 at 1986), na isa sa mahahalagang isyung pinagtalunan ang probisyon sa wikang pambansa.