Canada

Being bilingual is a metric for hiring, so some people who can say "Jim apple George" or "monet es George" will call themselves bilingual. So knowing enough to be hired, and knowing enough to actually do the job are two different things.

So, if I work at the CRA, and I go into a meeting where we're discussing some finer points about the tax code, and how it interacts with a s85(1) rollover or eligible vs non-eligible dividends, am I going to speak a language that I am confident that everyone in the room actually knows, or the one that I might need to repeat myself 15 times or make a mistake in front of everyone at work and look stupid?

Another (better) article that this article sites:

In short, francophone public servants feel uncomfortable expressing themselves in French because their anglophone colleagues are not sufficiently fluent in the language.

More than 39 per cent of anglophones surveyed said they do not feel comfortable expressing themselves in French. Around 70 per cent cited a lack of practice speaking French while 61 per cent feared having their accent and mistakes judged and corrected. Forty two per cent also reported feeling embarrassed when their francophone colleagues reply in English after they have tried to express themselves in French.

Didn't join the site to download the pdf, but it looks like it is trying to find a correlation between wanting to leave the public service and answering a survey question about how often you can use your preferred language. As such, I am not sure if they have any follow up queations on why people answered what they did in the survey, but it could be as simple as they have to interact with unilingual people. Even if they have a bilingual boss (who, even at CCC may not be very good), they may not have bilingual clients or team mates and therefore have to work in one language most of the time.

IT in particular can be tricky, since most things are only English. A lot of software tools only come in English, and a big chunk of vendor support is from the US and often does not have a French option. The contractor pool is also largely English since the Canadian private sector doesn't require bilingualism for tech workers.