In order to say things to other players not previously capable of such as "Repair me", "I need a ride", and others, create a character to your liking. Then, in your buddy list enter CHAT-TEST. Note: This code will only work in the rooms marked "Inevitable" with an arrow pointed towards them.
Jack Kension.

If you add CHAT-TEST to your buddy list, Square will be mapped to the "Voice Chat" function. The operation which was previously assigned to Square will no longer be available. For controller configurations A and B, Square is "Target Lock", and for configurations C and D it is "Negative". Press the Square activate the Voice Chat interface. Groups of words and phrases will appear around the reticle. The right side button cluster (Triangle, Square, Circle, and X) selects from among the groups presented. Green text indicates that another set of choices will follow. Blue text represents the final selection. You cannot move while the Voice Chat menu is active. If you want to abort a Voice Chat sequence, press R2. All of the Voice Chat selections have audio, and half of them have text. The audio and text generated by the Voice Chat system is only available on dedicated servers (which usually have an arrow in the server name). Note that the Voice Chat interface will function on non-dedicated servers, but there will be no audio or text. If you would like to remove support for the Voice Chat test and restore the normal functionality of Square, remove CHAT-TEST from your buddy list, go to the controller configuration screen and make sure that your desired control configuration is in place, then save your warrior afterwards to preserve the restored controls.
Crow550.

Alternately enter EXPERT-A or EXPERT-B (for control setting "A" or "B", respectively) in your buddy list. Note: CHAT-TEST cannot be in your buddy list. In addition to the previous secret conversation options, you can now throw away items.

Open the conversation menu by pressing Square. This will not work for player two and will prevent you from using target lock if your configuration is set to either "A" or "B". With this in mind, you may just want to go to rooms with green arrows pointing at them, because they never have target lock.
Outlaw_Spike.

Once you press Square to active the chat options, use the following commands to say what you need faster.