Explanation: ‘Yes, no, toaster is kind of a semi-idiom people use in Québec (they speak French) show the extent of their English skills.
-Do you speak English?
-I only know 'yes, no, toaster
Which is also kind of funny since most people actually say "toaster" instead in Québec, which goes to show how little of an achievement "yes, no, toaster" is.