Does Mote Auto Read Aloud for Google Forms work in Locked Mode?

Yes - Mote Auto Read Aloud for Google Forms also works in Locked Mode. 

The screen shot below shows what this will look like for students on a managed Chromebook, using Locked Mode. Please note that students will need to have Mote installed and active in their browsers. Please speak with your IT department if you're unsure if students have access to Mote. 

Translation support also works in Locked Mode, as shown below.

And of course, read aloud functionality works as expected in Locked Mode.