It has now been announced that the Nintendo Switch will support the MonoGame Framework. This news was revealed by Monogame themselves in a tweet. They then went on to say that the first games that will use this on Switch will be Tower Fall, Celeste and Stardew Valley. The Switch supporting MonoGame will be great for developers and help bring more games to the platform.
See the tweet below.
— MonoGame (@MonoGameTeam) March 1, 2017