How can I best implement multiple currencies to my online store?

Site URL: https://vidarlien.com

Hello, I am trying to find solutions for how to implement multiple currencies to my online store, and find it somewhat strange that Squarespace don't have a simple solution to this. It must be a common wish for e-commerce owners that their merchandises to reach internationally. There is research stating that customers prefer buying in their own currency. As far as I understand, you'll need multiple sites (one for each currency) which means you need to pay for multiple sites and have multiple domains. Any suggestions, or is this the only solution on Squarespace? 

Thank you in advance! 

I'm looking for solutions for this issue too. Thanks for asking this question.