Hebrews 1;8 is and example of strong bias in my opinion. Note the comparisons below with the NWT version.
New International Version(©1984)
But about the Son he says, "Your throne, O God, will last for ever and ever, and righteousness will be the scepter of your kingdom.
New Living Translation(©2007)
But to the Son he says, "Your throne, O God, endures forever and ever. You rule with a scepter of justice.
English Standard Version(©2001)
But of the Son he says, “Your throne, O God, is forever and ever, the scepter of uprightness is the scepter of your kingdom.
New American Standard Bible(©1995)
But of the Son He says, "YOUR THRONE, O GOD, IS FOREVER AND EVER, AND THE RIGHTEOUS SCEPTER IS THE SCEPTER OF HIS KINGDOM.
King James Bible (Cambridge Ed.)
But unto the Son he saith, Thy throne, O God, is for ever and ever: a sceptre of righteousness is the sceptre of thy kingdom.
International Standard Version(©2008)
But about the Son he says, "Your throne, O God, is forever and ever, and the scepter of your kingdom is a righteous scepter.
Aramaic Bible in Plain English (©2010)
But concerning The Son, he said, “Your throne, oh God, is to the eternity of eternities. A straight scepter is the scepter of your Kingdom.”
GOD'S WORD® Translation(©1995)
But God said about his Son, "Your throne, O God, is forever and ever. The scepter in your kingdom is a scepter for justice.
King James 2000 Bible (©2003)
But unto the Son he says, Your throne, O God, is forever and ever: a scepter of righteousness is the scepter of your kingdom.
American King James Version
But to the Son he said, Your throne, O God, is for ever and ever: a scepter of righteousness is the scepter of your kingdom.
American Standard Version
but of the Son he saith, Thy throne, O God, is for ever and ever; And the sceptre of uprightness is the sceptre of thy kingdom.
Douay-Rheims Bible
But to the Son: Thy throne, O God, is for ever and ever: a sceptre of justice is the sceptre of thy kingdom.
Darby Bible Translation
but as to the Son, Thy throne, O God, is to the age of the age, and a sceptre of uprightness is the sceptre of thy kingdom.
English Revised Version
but of the Son he saith, Thy throne, O God, is for ever and ever; And the sceptre of uprightness is the sceptre of thy kingdom.
Webster's Bible Translation
But to the Son, he saith, Thy throne, O God, is for ever and ever: a scepter of righteousness is the scepter of thy kingdom.
Weymouth New Testament
But of His Son, He says, "Thy throne, O God, is for ever and for ever, and the sceptre of Thy Kingdom is a sceptre of absolute justice.
World English Bible
But of the Son he says, "Your throne, O God, is forever and ever. The scepter of uprightness is the scepter of your Kingdom.
Young's Literal Translation
and unto the Son: 'Thy throne, O God, is to the age of the age; a sceptre of righteousness is the sceptre of thy reign;
New World Translation version of Hebrews 1; 8 But with reference to the Son: “God is your throne forever and ever, and [the] scepter of your kingdom is the scepter of uprightness.
DC