Sorry, but multiple languages is not supported in PowerDirector 11.
How long is your movie? If it's really short, you might be able to fit a 2 or 3 duplicate movies on a DVD, each with it's own language, each treated as a separate title in the main menu. PowerDirector supports multiple titles in one "movie." So, you would have to pick which movie you want to watch from the Main menu.
I haven't actually tried that with PowerDirector, I'm just imagining that it might work.
Gateway DX4380, AMD A8-5500 Quad Core 3.2GHz with ATI Radeon HD 7560D; 16GB RAM; 1 TB SATA 7200 RPM; Windows 8 Pro 64-bit; PDR11, PDVD12.