it might not be a valid assumption that all the kids will be able to speak English
many victims report hearing German spoken
it's not like these kids received a proper education either
reminds anon of the girl 'Genie' kept in dungeon-like conditions who pretty much couldn't speak due to lack of interaction
https://www.verywellmind.com/genie-the-story-of-the-wild-child-2795241