Testaments of GOD is about writing your sacred story for the benefit of your people and the education of the world. For the past 2000 years or so most of the world has been influenced by only a few sacred texts because it has not occurred to many cultures that they could also write their own sacred texts. It seems other cultures have not ventured into the sacred text business because of an imposed psychological monopoly. Some people believe that sacred texts were sent down by God from heaven.
Such people would never think or even consider writing their sacred text. Ask the average believer and you will hear statements like "the Bible was inspired" or "an angel dictated the Qur'an to Prophet Mohammad" With this mindset even cultures that really need their own sacred texts would not even consider the idea.
The truth is that you no longer need to use a foreign sacred text for your spiritual well being. However this is not to imply that you cannot learn from foreign sacred texts; it just means that your sacred text would benefit you more than any foreign sacred text.