Hi @owenheller ,
I'm not sure that Shopify Pay specifically, supports the Rand, there's a table on this page with their supported currencies.
That said, two possible solutions I can think of exploring are:
1. You could accept payments in another currency, details here.
2. Could you accept your payments with PayPal instead? Details on how to set that up with a PayPal checkout here.
Founder @ www.preproduct.io
Test and make sales for future products