You have noticed that Jive Daily Hosted notifications are in English even though the language set on your community or mobile device is not English.
This is by design, as Jive Daily Hosted does not currently support internationalization (i18n) of push notifications. This is currently in the process of being evaluated as a product enhancement under the code JIVESPECS-1384.
Please follow the Jive Hosted Product Release Schedule and review the notes listed there for each release to determine if this has been added as a new product feature.
For more information, please contact your account executive or customer success manager.