They weren't able to. It isn't a question of motivation. They were simply unable to.
For Correctional Service Canada in the Quebec region, only 2.9% of its employees are English-speaking Quebecers. It's very difficult for it to attract English speakers to work in the institutions. More important and more concerning for us was that, once you're a guard, you get $800 a year for your bilingualism bonus, but because there are so few programs available for English-speaking inmates, the work load for those guards is much higher than the work loads for guards working with French-speaking inmates. So, guards who are in a bilingual position actively seek unilingual positions. It's not worth their time to take the $800 for the reduced work load. There are actually systemic disincentives for guards to work in both official languages.