sentences: )He promoted the use of English and French as languages of both service and work, and he promoted the teaching of "French immersion" in English-language schools across Canada as a longterm support for an officially bilingual Canada.During his tenure as commissioner, Spicer dealt with many tensions between English- and French-speaking Canada, notably a potentially nation-breaking 1976 crisis, when many English-Canadian pilots threatened to block the Montreal Olympics over the use of French in air traffic control.