Sadly no luck…and re-syncing these manually would be a royal PITA. I’d be happy to re-encode them myself from source DVDs if I was able to find them (I’d assume the DVDs would have multilanguage?). But so far no luck :(
EDIT: Holy cow I think I might have found them. You can search Simpsons. MULTi DSNP RondoBYM on sites such as 1337. These encodes are…big, taking 25-30GB per season, but because they include about 10 languages audio? This is still untested, I’m trying to download these at the moment. Spanish, Latin Spanish, French, Portuguese are included (and many others, Czech, Turkish, Japanese?). I plan to run some remuxer or something later to cut out the audios I’m not interested on. Sadly (or obviously) this guy didn’t manage to go any further than seasons 1-8. The classics, I guess.