The problems weren't just whether or not a sound element was available, it was an issue of WHAT was done in the sound mix - movement, volume, tonal quality and so on.

A perfect example is the fanfare when Red Leader makes the initial attack on the Death Star. On the US English track, that music is pushed so far into the background that it's almost inaudible. But the same scene ON THE SAME DISC on the French and Spanish language tracks has the music vibrant and proper. So, the music is only supposed to be in the foreign language mixes and not in the English mix, in spite of the fact that it was in ALL PREVIOUS English language sound mixes?