He played junior hockey for the Sorel Black Hawks and the renamed Sorel Éperviers from 1968 to 1970. Not drafted by any NHL team, Langlais played senior hockey and in the Eastern and International Hockey Leagues until 1973, when the Minnesota North Stars signed him as a free agent.
Langlais saw some action with the Stars in 1973-74 and 1974-75 but mostly played in the minors. He scored 41 goals for the New Haven Nighthawks in 1974-75.
He retired in 1980.
In the NHL Langlais scored 4 goals and 4 assists in 25 games.