Feallan said:
Portugese dub is 1980 Brasilian VHS? I found info that there are two versions, but no info about dates.
https://www.youtube.com/watch?v=cqTvzOgOVPI
Yes. For the theatrical version there was this dubbing made for TV broadcast that was later released in VHS (mid 80's). This was a limited edition (retail only, I believe), so it is considered by many a rare nostalgic treasure.
For the 97 SE, from what I know, LFL required a redubbing with modern sound equipment. A consequence: an entire new cast of voice actors (except for Obi-Wan). This redubbing was therefore caried over for the 2004 and 2011 releases, with altered sound mix in certain scenes to match the original English mix.