Can you please tell me if it's possible to have Body sections in the JSON list formatting as multilingual?
If yes, how to please?
Unfortunately, it is not possible using JSON formatting capabilities in SharePoint.
Unlike the header and the footer, body configuration only allows defining one or more sections and adding one or more columns into each of those sections.
Body configuration does not support advance JSON customizations like header/footer (or column/view formatting in list views).
Source: Configure custom body with one or more sections
You may need to customize the list form using Power Apps to make list form multilingual.