You have to be inclusive of even the exceptional cases when you're dealing with this sort of thing. Another possibility for those people might be not to change the form of the ballot but rather to have some kind of special instruction to the returning officers. This may already happen, I don't know. Presumably if you're in a remote community that has only one of the non-official languages spoken there and used, the returning officers are drawn from the community. I actually don't know that for a fact. I'm just guessing that's the case.
On September 30th, 2016. See this statement in context.