We build the app following the Shopify API policy to sync the Product information when it has some updates. If your store does not have the languages listed below, it is possible that updated information for your products will not be displayed correctly.

https://shopify.dev/docs/api/ajax/reference/predictive-search#supported-languages

In this situation, you need to go to the Nitro Lookbooks app and resave the lookbook again to synchronize the latest product information and display it correctly on the Lookbook