To be fair to them, in 1990 it was common enough to hear someone call any/every electronic game a "Nintendo".
There was a real risk of their trademark getting Kleenex'd, at least in the US.
The title is very "grandma who doesn't know the tech" coded. Every game system is the Nintendo, controllers are remotes, etc.
Controllers are regional. It's Joystick here :)
For me in the US joystick was mostly the specific style that came with the Atari 2600 with the large vertical piece. Sometimes the thumb sticks those evolved into were also joysticks but mostly that specific part instead of the whole controller getting that name.