It doesn't work like that. If your going to use ML in a register_concmd you have to do the formating first.
Code:
new what[64]
format(what, 63, "%L", LANG_SERVER, "LANG_CMDIN")
register_concmd("say -rtsys","RTSYS_Information",-1, what)
This will only display all the information into the server language. So if you are trying to show it for the player language when they use the command. It will not work for that purpose.
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