According to the pricing page here…
It’s 344.23 Argentinian however I went to buy it and it was actually cheaper than that and it was 224.99 which translates to $1.66.
I created an Argentinian account on the web and then linked it to a new user on my Switch, logged into the eShop, entered my normal CC information and set Buenos Aires as the province, and the purchase went through.
I can confirm that it is also in English and has a language option, but it defaults to English.
The game came out today too.