In order to see the translated description, the application should have a description and the specific translation should have a label.

When the description is translated for an application that does not have a description or does not have a translation label, the description translation is saved but hidden. It is only shown when the application is given a description and/or a translation label.


P.S. Discover Quick Update Translations, the simple way to update Labels and Translations in just a few clicks. Find it on AppExchange: https://appexchange.salesforce.com/appxListingDetail?listingId=fa9afbfe-74ff-4027-ac32-2cdfd58184d3