You selected “Display only forced subpicture”, which mean normal subpicture will not be rendered.
I thought that was really weird, I remembered checked on both the Subpicture (ENGLISH) and Checked on “Display only forced subpicture”. It will render English subpicture on the output…That was what I have been doing all the time.
Or I am wrong…I should uncheck “Display only forced subpicture” but check on the subpicture (ENGLISH). This will render English Subpicture.
Kind of Weird…come to think about it.