In DVDA 4.5 the quick select track language button/indicator is not visible when the timeline shows movie media but it is visible when showing menu (where it is completely useless as the menu can have only one audio track). For subtitles track it is OK. I have checked the behavior of this in DVDA 4.0 and there it is correct - not showing on menu track, visible on movie track. I assume this is a bug.