If you are located outside the US, you can change the displayed currency on Wish. Please note that this will not change the currency that you pay in; this will only change the currency in which prices are displayed.
From the Mobile App
Select Settings > Currency from the app menu. Toggle the currency you would like to display on Wish.
On the Website
Go to your settings page at www.wish.com/settings and change the currency under the section Change Preferred Currency.