Hello people
I have a .mkv video file.
The file contains 2 audio , which is English and Japanese.
I wonder how i could remove the english audio and keep the japanese.

Thanks !

Get mkvtoolnix (google, free download), open the file in it, untick the tracks you want rid of (including and unwanted subs) and make sure you change the default status on the remaining tracks so they'll be used instead.

Then just remux the files & test.

Thank you skul !
Yo , you chums could close this thread now.