YOU SAID:
こんにちは私は推測
INTO JAPANESE
こんにちは私は推測
BACK INTO ENGLISH
Hello I guess
INTO JAPANESE
こんにちは私は推測します
BACK INTO ENGLISH
Hello, I guess
INTO JAPANESE
こんにちは、私は推測します
BACK INTO ENGLISH
Hello, I guess
That didn't even make that much sense in English.