Architecture Puzzler #238

What would you do if your mason, as directed, were to broach a special stone you ordered, so as to bifurcate it, and the stone broke in two?

Glenn Murcutt of Australia was the 2002 Pritzker Architecture Prize recipient. He was the first Australian to win the prize and one of many winners from an English-speaking country since the first prize was awarded to Philip Johnson in 1979. Twice the award has gone to native Spanish speakers (in 1980 and 1996) and twice to native Portuguese speakers (1988 and 1992). Who were these four architects?