Polish language OpenCart

Yes, this Polish language pack is compatible with OpenCart 3. As for the Journal theme, it should work seamlessly since the language pack translates the core parts of OpenCart, which includes the front end and control panel. However, keep in mind that any custom text or unique features added by the Journal theme might not be covered by this translation. If you encounter specific untranslated elements, you might need to manually translate those parts. If you have further questions or need assistance, feel free to reach out!