From Hostek.com Wiki
Enable spell check for Roundcube
- SSH into your cPanel VPS
- Open /usr/local/cpanel/base/3rdparty/roundcube/config/main.inc.php with your preferred text editor (example: nano).
- Set the $rcmail_config['enable_spellcheck'] option (line 384) to true.
- Save the change to the main.inc.php configuration file.
- For cPanel versions earlier than 11.36: Run the
/usr/local/cpanel/scripts/makecpphpscript. This script will rebuild cPanel's internal PHP with an OpenSSL module.
Reinstall RoudCube on a cPanel VPS
- SSH into your VPS