To create a duplicate of your edited video in a different aspect ratio
From the visual editor:
Click on the Duplicate button located in the top right corner of the screen
Choose the desired aspect ratio (9:16, 1:1, 16:9)
A duplicated project will be available for you in the project library.
From the project library:
Click on the 3-dot icon located in the top right of the thumbnail.
Select "Duplicate to 9:16 / 1:1 / 16:9" from the options.
Choose the desired language you want to tranlate your video to
A duplicated project in the new language will be available for you in the project library