Thank you for the reply. This is convincing and makes sense. Anyway the fun playing the game is still there whether proper names are accepted answers or not. I appreciate the clarification..
Thank you for the input but I don’t think this is the reason as some proper names are accepted by the application while other are not. I wonder whether Mr. Dordle will reply and clarify this issue.
Example of proper names accepted by the game application:
Why Islam is not recognized as a valid word Mr. Dordle?