YOU SAID:
Hi is the same as hello, hey and heya.
INTO JAPANESE
こんにちは、こんにちは、ねえとheyaと同じです。
BACK INTO ENGLISH
Hello, hello, hey and the same as heya.
INTO JAPANESE
こんにちは、こんにちは、ねえ、ヘイヤと同じです。
BACK INTO ENGLISH
Hello, hello, hey, it's the same as Hayya.
INTO JAPANESE
こんにちは、こんにちは、ねえ、それはハイヤと同じです。
BACK INTO ENGLISH
Hello, hello, hey, it's the same as Hayya.
That didn't even make that much sense in English.