I have some movies in MKV format that play in English when playing on my laptop via VLC player. They also play fine on my TV when I connect my laptop via HDMI. However, when I move the file onto a USB Drive, and then play that on my TV (Panasonic Viera TC-L42ET5) by plugging the drive into the USB slot (on the TV) it will play the video fine but the audio is in a different language. One movie played in spanish, and another played in German. What is causing this and is there any way I can choose which language to play? All my settings on the TV are for English, and Cable and everything else (including other movies) play in English fine.