Use APKPure App
Get French dictionary (Français) old version APK for Android
French 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