How to install a language pack into a now-defunct 3rd-party keyboard? 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 2.6.0.1), 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.
Confirmed to work on Android 5.1.1 with 8pen version 2.6.1 and 2.7

Since mid-2014, 8pen ( is only accessible from your purchases in Google Play) language packs no longer install for the keyboard since the servers are no longer operating. Luckily, one of my roomates hasn't updated his phone since he downloaded the English dictionary. 

Using Android File Manager I copied the original dictionary file 

Android/data/com.eightpen.android.eightpen 

and loaded it onto my Nexus 7 which has 8pen version 2.7 installed. After clicking to "download" the language pack, it successfully read the new files and the dictionary is operational.

Unfortunately while trying to figure all this out I uninstalled by 2.7 version and can't get it back... but the same method is working on version 2.6 on my Nexus 6.

While this is not the most elegant solution, you can download the file you need from here and copy the folder needed into Android/data. I've included a README with detailed steps. Happy 8penning!

(Now to figure out how to get version 2.7 back.)