Wix has built-in functionality called "Price breakdown widget" for installment payment options. This is a semi-static message box on the product page. The widget currently supports only some payment methods.
This widget is live and automatically added to Wix sites, if the region includes the supported payment method; no action needed by merchants.
The widget does not currently support all languages; if the language is not supported, the widget is displayed in English. The widget is not currently configurable in the Wix store admin.
You can include Klarna branded on-site messaging outside of your product page by manually adding Javascript and code for Klarna On-site messaging to any page of the website (details) except your product page.
Head to our marketing guidelines page to get more information on including Klarna messaging throughout your customer journey.