Yes , it is the WORD of God. The IDEAS ( WORD) were dictated by God to man and man wrote those IDEAS (WORD) but when man wrote the ideas given by God they wrote it base on their own historical setting ,educational background and upbringing.So though they are the words of men, they are called the Word of God?
For example the job of a secreatary is to transcribe the words dictated by their boss to them although it was written by the secreatary it is still the word of their boss.Obviously the secreatary will have to fine tune the sentences that he/she have written and when she does this there will be a slight change in the sentence structure but the main idea does not change. Now, the sentence structure will depend on how good the secreatary in english grammar or whatever language they are using.
It is the same with God the words or ideas were dictated by God written by men and their writings will depend on their educational background, historical setting and their upbringing.