YOU SAID:
Player Unknown enters the chat. Player Unknown leaves the chat. Player Unknown doesn't exist.
INTO JAPANESE
チャットをプレーヤー未知に入る。チャットの選手不明な葉します。未知のプレーヤーは存在しません。
BACK INTO ENGLISH
Chat to unknown player into. An unknown player leaves the chat. Unknown player does not exist.
Come on, you can do better than that.