The answer is that many of the words are English words that we memorize. Some words, pronunciation errors until the foreigners listen to not understand or vote cast, the meaning has changed.
The answer is that there are many English words we recite together. Who mispronounce some words we did not know about until foreigners. Or vote cast to make significant changes.
The answer is, there are many words we memorize English words? Which some words we wrong pronunciation that foreigners can't hear you. Vote cast that meaning change.