The game uses local storage so incognito mode will wipe it after the end of the session. Export/Import should still work, but keep in mind that Import automatically prestiges the game. Other than that, I don't see a way to reproduce it.
The game tells me to check the "word of the day", today its "summerize"... and it`s not a valid word, like many others. Feels like the games dictionary is very limited.
The game uses local storage so incognito mode will wipe it after the end of the session. Export/Import should still work, but keep in mind that Import automatically prestiges the game. Other than that, I don't see a way to reproduce it.