Unfortunately harassment in DM’s is one of the most common, and worst places for harassment. We’ve had this discussion around “conversations between friends”, but that’s where individuals typically try to go for some of the most vitriolic comments. In offering online communication, we have an obligation to do what we can to try to protect our players from online harassment and bullying, and DM’s are the worst place for this.
The chat system should not be this slow, and it sounds like this may actually be a network communication issue rather than the filter. Regarding blocked messages, the chat system is based on the language you’re set to. So if you’re set to English in the client, it’s going to read the message as English. This is one of the limitations we’re currently working on.