YOU SAID:
I do not have a son, but a great great grandson, who is not my son, but my dad.
INTO JAPANESE
息子が、私の息子が私の父ではない偉大な偉大な孫とはありません。
BACK INTO ENGLISH
And great great grandson son is my son is not my father.
INTO JAPANESE
偉大なひ孫の息子は、私の息子は私の父ではないです。
BACK INTO ENGLISH
A great great-grandson son is my son my father is not.
INTO JAPANESE
偉大なひ孫の息子は、私の息子は私の父ではないです。
BACK INTO ENGLISH
A great great-grandson son is my son my father is not.
Come on, you can do better than that.