I wouldn't even enter "correct" localised voice-over actors if they aren't listed within the main-credits, but merely as a "forced extra-chapter" after the end of the feature.

For those that do enter these, I see absolutely no reason, why those shouldn't be entered for every available Audio-Track (if listed and as long as you don't have to manipulate player settings in order to make the Audio-Tracks available).

Personally, I add the local cast list. Maybe that's because they're are mostly broadcasted on TV with the local audio track, but I don't think a French audio track will add something to a profile where French is not one of the locality's official languages.

Personally I'm not interested in cast lists non other than the actual cast list from the endcredits and the local cast list though I understand that people don't want to add cast lists besides the one from the endcredits.

I like to track the voice actors for localized animated features. It's one of the selling points after all and is usually advertised on the packaging. They are usually credited after the original cast listing so I see no problem adding them as long as the source is the disc itself. However, it does NOT mean that I'm interested in the voice actors from any other locality. And it would usually require that I select another language on my player or disc menu to see these credits anyway, something I have no reason to do.

I'm against adding voice actors who are not credited in the movie. If they get accepted, the least minimum requirement is to tag them as Uncredited, and no invented dividers. If there really is a general interest in voice actors within the cast section, then the voice actors for every additional language: I would not deny a French user who lives in Spain and buys an Italian release of an English movie his credits.