If links on your translated page should redirect the user back to the default language, then the reason could be that the theme or an app is using hardcoded not-localized urls in its code.


The following article explains how links & URLs should be defined in the templates in order that they work with multiple languages:

https://help.shopify.com/en/api/guides/multi-language#developing-themes-that-support-multiple-languages


All available links of the routes object:

https://help.shopify.com/en/themes/liquid/objects/routes