Regarding prices and images, specifically in relation to products, you can carry out testing through a Product Test within our app.
For language adjustments, if you are modifying site content, this can be accomplished within a theme. In cases where language changes occur within product descriptions or similar contexts, such testing can be performed within the Product Test section.
However, if you're referring to alterations in Theme Language settings, we are not aware of a method to conduct such testing. A prerequisite for effective A/B testing involves the ability to swap product or theme versions at regular intervals, which isn't applicable to language changes in the Theme Language settings.