Bulk upload of translations to replace cumbersome and slow existing process

Description

Hello,

The existing process to update translations is very slow (3-4 minutes per translation) when using the User Interface Text tool. We can only do one at a time, for each language, and translating a heavily-customised UI into multiple languages can therefore be a several week process, which is not acceptable for end users. 

We would like to be able to bulk upload translations into Engagement Cloud - for example within the UI text tool, or via a .csv file.

This would make the administration side of the application more efficient and save overheads for our customers - it also just seems cumbersome and illogical for the application to be setup to only deal with one translation at a time.