SUMMARY If one wishes to play the SDH subtitle track one has to manually select the SDH subtitle from the menu instead of being able to select it as a preference. In the settings you can only enter 3-letter lang codes e.g. eng (non-SDH) as a preferred language but cannot enter something with operators like SDH@eng as an option. STEPS TO REPRODUCE 1. Play a video that has both eng and eng SDH subtitle tracks (or the same for multiple other languages) OBSERVED RESULT It is only possible to select eng as a preferred language, there does not seem to be a way to use an operator to enter something like SDH@eng. You can only go to that track by manually selecting it from the menu. EXPECTED RESULT To be able to enter SDH@eng, etc. and have it recognized by the player and have it auto-select it. Operators should work as there may be multiple subtitle tracks for ass, pgs, SDH, regular language srt, etc. SOFTWARE/OS VERSIONS Operating System: SteamOS 3.4.11 KDE Plasma Version: 5.26.1 KDE Frameworks Version: 5.99.0 Qt Version: 5.15.6 ADDITIONAL INFORMATION