If you use the Marketplace extension, please check if the Price word is available in the Loco Translate/Plugins/HivePress Marketplace section. You can remove the Price attribute in Listings/Attributes since it won’t affect the built-in Price field anyway.
If you’re sure that it’s a built-in field (not a custom attribute in Listings/Attributes) then using Loco Translate is the best way, it allows you to keep the translation file outside of the theme folder so it’s safe from the theme updates (make sure to select a Custom location while adding a new language in Loco).
Sorry for the confusion, the “Price” word should be available in Loco Translate/Plugins/HivePress