for %%A in (*.mkv) do ("C:\Program Files\MKVToolNix\mkvmerge.exe" --ui-language en --output "new_%%~nA.mkv" --language "0:en" "%%~nA.ass" --language "0:und" --default-track "0:yes" --display-dimensions "0:1280x720" --language "1:ja" --default-track "1:yes" "%%~nA.mkv" --track-order 0:0,1:0,1:1)