There's this keyboard I really love called 8pen. I made the mistake of uninstalling it without checking and then later realized that it had been pulled from the app store, and the developer seems to have ceased all activity since 2013 . . . I have the app now (version 22.214.171.124), but it will no longer download language packs from the developer and therefore doesn't have predictive text, which was one of the app's original strong points. Presumably it can't download the language packs because the download servers have been unplugged.
Is there some way to get into the app's file system and install a language pack by hand? I would just want English.