Your husband might want them, too. What's the harm in keeping them?
Well, I would of course double check with my husband before I deleted them.

I wouldn't delete anything he still wanted. But, you're right, there is no harm in keeping them. It just seemed like they were "cluttering" up my archive, since right now, they are pretty much filling up the entire first page on the Manage your Kindle page. (It looks like it's actually both dictionaries and the Kindle User's guide in a bunch of languages).