If it's a joke about Japanese conjugation, but that's not how Japanese conjugation works, is it actually a joke about Japanese conjugation?

If someone tried to make a joke about English conjugation that hinged on the past-tense of "to run" being "ron" instead of "ran," would that even qualify as a joke? "He has such a sweet tooth, the moment his diet ended he didn't 'ron' to the store, he 'macaron' to the store!" makes no sense. That's what the tiramisu meme reads like, except it also misspells tiramisu, so the English joke would actually be more like, "he has such a sweet tooth, the moment his diet ended he didn't 'ron' to the store, he 'ice cron' [misspelling of ice cream] to the store!" which makes even less sense.