Original sentence: The francization programs for businesses were largely successful in the 1980s; however, the 1990s saw the return of bilingualism and the exclusive usage of English in a number of new economic sectors that did not exist in Quebec before, for example the high-tech industry
Edited sentence: The francization programs for businesses were largely successful in the 1980s; however, unfortunately (or fortunately) the 1990s saw the return of bilingualism and the exclusive usage of English in a number of new economic sectors that did not exist in Quebec before, for example the high-tech industry