Kodi DSPlayer – DirectShow Player for Windows
internal streams are selected by lav splitter preferences, with the external streams lav spltter can only decide to use an external track instead of the internal one but then it's xysubfilter to set which one between all the external tracks

i needs more details to try to reproduce, all the languages presents in the file and external subs that you added

Messages In This Thread
Lockup on STOP issue resolved! - by MKANET - 2015-04-11, 21:59
RE: Kodi DSPlayer – DirectShow Player for Windows - by aracnoz - 2015-09-01, 09:18
RE: 4G aware patch - by MagikMark - 2015-09-08, 03:27
Alt-F4 no longer quits - by JeffA - 2015-10-31, 20:38