1. Added %initiator-player% everywhere commands are used.
2. Maximum nickname length is now set to 32 characters.
3. Added chat delay for both players and initiators.
4. Added maximum and minimum message length limits for players and initiators.
5. Added sounds for players and initiators upon receiving messages in chat: when a player sends a message, the initiator hears a sound; when an initiator sends a message, the player hears a sound.
6. Added a sound for the initiator during timer countdown.
7. Added a sound for the initiator at the start of a check.
8. Added 2 keys, Sound-Start-Check-Initiator and Sound-Start-Time-Check-Initiator, to the CmdArgStart.yml file.
9. Added 4 keys (Max-Message-Length-Blocked, Min-Message-Length-Blocked, Chat-Cooldown, Exceed-Character-Limit) to localization files.
10. Added 14 keys (Max-Message-Player-Length-Blocked-Enabled, Max-Message-Player-Length, Min-Message-Player-Length-Blocked-Enabled, Min-Message-Player-Length, Max-Message-Initiator-Length-Blocked-Enabled, Max-Message-Initiator-Length, Min-Message-Initiator-Length-Blocked-Enabled, Min-Message-Initiator-Length, Cooldown-Chat-Player-Enabled, Cooldown-Chat-Player, Cooldown-Chat-Initiator-Enabled, Cooldown-Chat-Initiator, Receiving-Sound-Player-From-The-Initiator-On-Check, Receiving-Sound-Initiator-From-The-Player-On-Check) to the Listeners.yml file.

Don't ignore update 2.7 below, read it!