Use APKPure App
Get German dictionary (Deutsch) old version APK for Android
German completion dictionary for use with Hacker's Keyboard
Based on the Cyanogen dictionary as released under Apache 2.0 license at
https://gist.github.com/CyanogenMod/android_vendor_cyanogen/tree/gingerbread/overlay/common/packages/inputmethods/LatinIME/java/res