This is great news for me! Not for everyone else..
I live in Japan and am buying the Switch bundle here. I know Japanese so if I didn't have the option to change the language it'd be okay but since I grew up with the English version and because I want to share content online with English speakers this is great for me.
So I guess in the game my region will be Japan, so I'll get those events, but I can still play in Japanese.
Also the accounts thing is a bit confusing to me haha. Also I don't own a switch so I'm confused, are Nitendo accounts linked to eShops? Meaning to access a different eShop I need to make a new Nintendo account? And it's one Nintendo account per Switch profile? It's all very confusing to me.