Steps To Reproduce
1) Install Hebrew Language Kit.
2) After restart, set System Direction to 'Right to left'.
3) Set the cursor Appearance to 'split'.
4) Remove Hebrew LK using the Installer.
5) After restart, install the Cyrillic Language Kit.
The System Direction is still "Right to Left" and the cursor appearance is still "split". The Cyrillic Language Kit alone does not offer a way to reset these options.
Workaround
Reinstall the Hebrew or Arabic Language Kit, and manually reset the System Direction and Cursor Appearance before custom removing it.