diff --git a/packages/hydrogen-react/src/useMoney.tsx b/packages/hydrogen-react/src/useMoney.tsx
index 871f12195c..89fa4a5cf7 100644
--- a/packages/hydrogen-react/src/useMoney.tsx
+++ b/packages/hydrogen-react/src/useMoney.tsx
@@ -103,7 +103,9 @@ export type UseMoneyValue = {
  */
 export function useMoney(money: MoneyV2): UseMoneyValue {
   const {countryIsoCode, languageIsoCode} = useShop();
-  const locale = `${languageIsoCode}-${countryIsoCode}`;
+  const locale = languageIsoCode.length === 2
+    ? `${languageIsoCode}-${countryIsoCode}`
+    : languageIsoCode.replace("_", "-")
 
   if (!locale) {
     throw new Error(