This is a meme using a japanese comic (manga). As japanese is traditionally written feom top to bottom and right to left, this is what mangas use today.
Early translations mirrored or rearranged the pages to fit the english language, but that isn't the case anymore for more modern translations.
See the official translation of "Blade of the Immortal" by Dark Horse from 1996 onwards where the layout was rearranged on every page for an example of the older practice.