Why did God change Abram's name to Abraham?

you cannot understand this verse in the Bible if you read it in English you can understand it only in Hebrew it's so important to learn Hebrew if you want to understand the Bible number I don't know Genesis 17 verse number five and your name shall no longer be called Abraham your name shall be Abraham why for I've made you the father of a multitude of nations in the Hebrew Bible multitude of nation is hamon go when God just add this letter hey to his name it's the same letter of the beginning of the word hamon and there is another secret here one of the name of God is hey when God had the letter hey to his name it was sign that he will fulfill this Covenant because he is now part of Abraham so now the word hamon is part of the name of Abraham and God is part of his name too when you change your name when you change the letters of your name it can change your future and this is one of the hidden secrets that you see here in this verse you can understand only in Hebrew so important to read the Bible in Hebrew