Do you want to define a fallback which uses local translations?
Browser fallback with local / bundled translations
With i18next you can configure a fallback backend to be used in the browser. It will try to load from your primary backend (in this case from your locize backend) and if the primary backend is not reachable or does not serve translations, your second backend (in this case local or bundled translations) will be used. This is all possible thanks to the chained backend.