Wow, what a great find! I know a few people here who may have an interest in this, but I’m mostly interested in the first 30 minutes. If you have full-length links to share, I would love to know about it.
The theatrical releases in Europe often had different text translations than you’d find for home video releases. For example, I see a slightly different translation for “A long time ago in a galaxy far, far away…”. Also, this appears to confirm that Return of the Jedi was very standardized in Jabba subtitle fonts (where Star Wars Greedo fonts were very random)
I’d also confirm that when you say “Spanish”, you mean from Spain, rather than the Latino release, which would also be a popular find!