Sadly, fully-functional DVD software (meaning that you can create menus, scripts, subtitle tracks, audio tracks, and other programming) has not been sold in many years.
My setup has macOS 10.12 Sierra running a virtual machine of 10.6 Snow Leopard Server, the last version of macOS which could run DVD Studio Pro without missing parts of the interface. I have DVD AfterEdit on that virtual machine as well, for the times when I need to manipulate a dual-layer DVD, or produce a DLT image for replication.
Setting up a computer for DVD creation today is impossible, unless you have access to old hardware and old operating systems, as well as the antique software DVD-ROMs. DVDs can still be created (in Roxio Toast), but you won’t be able to include the scripting to tie menus to video assets, nor will you be able to use menus to change audio and subtitle tracks. Changing audio and subtitle tracks can still be performed by the viewer using their remote control, but I’m not sure how you would add multiple tracks (either type) to assets using Toast.