The PSN filter just filters words specifically, it is not intelligent.  Using Labelbox and training data, the dev teams can flag english sentences as good or bad or containing hate speech and filter language instantly with a machine learning model to prevent abusing language to other players, using spaCy python package.

Here is a link to a sample project:

https://medium.com/isiway-tech/deep-nlp-for-hate-speech-detection-25eed707997

https://github.com/mandar196/Hate_Speech_Detection-NLP

https://youtu.be/jti2sPQYzeQ

You can use flask to make an API to call the method every time a post goes to the server.