That's really a terrible translation. To me, it shows contempt for the word of God to add to and modify it. For example,

(John 3:16 NIV) "For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.

There's no reason to add to it, to modify it, or have other words in parentheses. It shows contempt for the Bible and the God who gave it to us.