The answer is, we use the vocabulary to memorize some words, pronunciation errors until the foreigners listen to not understand or vote cast, the meaning has changed.
The answer is that we used to memorize vocabulary. Who mispronounce some words we did not know about until foreigners. Or vote cast to make significant changes.
The answer is, we use the method of memorizing vocabulary. Which some words we wrong pronunciation that foreigners can't hear you. Vote cast that meaning change.