If the Duress PIN is an obvious one, it may be one of the first ones your adversaries try. Like 1111 for example. So you may not even have to tell them the Duress PIN for them to attempt it.
Why would they write anything else in English? We don't write Deutschland or România either, do we?
The only strange thing is that CNBC decided to use the Turkish name of the country, probably from some misunderstanding of the recent official UN name change.