I was watching some of the final Halo 2 anniversary cut scenes on the Halo Channel when something weird happened. After clicking on the following video in the queue, the dubbing of the video went from English to what I assume is Japanese. I stopped the video and replayed it where it fixed itself back to English. It mainly happened once a video ended and under the credit in the queue it gave me the next video in the order but like I said during any talking scene it was in Japanese. I had to click the guide button and scroll to the video once more and replay it for it to go back to English. Just thought I should bring it up.
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> I was watching some of the final Halo 2 anniversary cut scenes on the Halo Channel when something weird happened. After clicking on the following video in the queue, the dubbing of the video went from English to what I assume is Japanese. I stopped the video and replayed it where it fixed itself back to English. It mainly happened once a video ended and under the credit in the queue it gave me the next video in the order but like I said during any talking scene it was in Japanese. I had to click the guide button and scroll to the video once more and replay it for it to go back to English. Just thought I should bring it up.
This happened to me. I have a forum thread about this titled “Intermittent Wrong language” that has a work-around 343 found for this. Check it out and hope it helps. 
Decided to just post the solution here to make it easier for you.
“Thank you for that… I am able to reproduce this! I believe the language is defaulting to Korean, but there seems to be a work-around, at least it worked for me:
During video playback, open up Closed Caption or Subtitle options, and select the language you wish to swap to. I actually selected ES (Spanish) then selected EN (English) and let the video complete.
Then, from the end screen, I clicked on the mini-video window to Replay, and it played back in English. It worked for me at that point… Will enter a defect on this issue though, as it should not have defaulted to Korean.
Incidentally, when I went to Another Day at the Beach, post Juggernaut, it had remained in English for me. Hoping this works for you as well.” - ChicknBoneJones