Language is constantly evolving. New slang, words, and formatting rules appear regularly. Official versions receive updates to handle these changes. A cracked version will likely be cut off from updates, rendering it obsolete quickly.
Learns your typing patterns to provide faster word predictions and shortcuts. Troubleshooting Activation Bagan Keyboard - App Store
A small translation office used a cracked version of Bagan Keyboard on three computers. Within a week, the entire network was encrypted by ransomware demanding 0.5 BTC. The cost of recovery? Far higher than three legitimate licenses.