Rhythmyx 5.7 - users with certain role can't see content for a certain locale?

On my Rhythmyx 5.7 server, we added a locale (Italian) - we already had a number of locales defined. We’re now finding that some users (without admin access) are unable to see the content created for that locale. The locale was made visible to the users, so they could select a value for that field, and all the users stay in the en-US locale on their client.

Does anyone have a clue about why content for a certain locale would not be visible to users with a certain role? I know where I would look for visibility settings for this in Rhythmyx 6.5, but I don’t know where to look in Rhythmyx 5.7

Thanks for any ideas-