The point being that Arabic does not translate into English well.
There is nuance and subtitles of meaning lost.
It is always better if one is able, to read in the mother tongue of any work.
The Bible is no different, much is lost from Biblical Hebrew and Aramaic into other languages. Even worse is the gross simplification of higher English into simplistic English. The JW have altered the Bible to suit their own needs as well.
So relax, you haven't found anything special about the Bible over the Quran and Rev 14:6 does not mean what you have been told to believe.
And no lie was found in their mouths; they are blameless. Then I saw another angel flying overhead, with the eternal gospel to proclaim to those who dwell on the earth—to every nation and tribe and tongue and people.
The eternal gospel is all religious gospel from beginning to end eventually becoming a single gospel to every nation and peoples. Islam and Christianity and others will all be replaced by a global gospel.