Complex sentence: English-language Scrabble is the original version of the popular word-based board game invented in 1938 by US architect Alfred Mosher Butts who based the game on the letter distribution in the New York Times in English.
Split into simpler sentences: English-language Scrabble is the original version of the popular word-based board game invented by Alfred Mosher Butts in 1938. He was American and based the game on the letter distribution in the New York Times in English.