English's large vocabulary actually makes it easier as a second language. Adults are really good at learning new words, but struggle with morphological and gen

English's large vocabulary actually makes it easier as a second language. Adults are really good at learning new words, but struggle with morphological and gender systems. Complex morphology seems to have some benefits that push languages towards including them, but are only sustainable when those languages are predominantly learned by children, who can pick up morphological complexity easily, not adults, who can't.