What is the difference between testament and will? I've looked up the dictionary but still can't distinguish these two words.
Testament can also be used to describe a "witnessing/evidence" of something like: "testament to his strength, he dragged 500 pounds of concrete". Will can also mean determination.
"Will" is the word in common use. "Testament" is not used except in very formal legal texts.
Di chúc means testament, will. So "will" should have been accepted.