When you export out your project from Construct to Cordova, you can select the minimum required version from the dedicated dropdown.
At this time, the minimum minimum version is 12 and otherwise you can select 13.
For the multilanguage support, I believe this is likely to be setup in xCode, or perhaps even in the store page.
Please refer to the documentation of xCode, or the documentation of the target store to check out how to properly configure and display your application appropriately.
Ashley