I use FSX-SE...I have an old program called Traffic360 that I completely forgot about. I believe it was already installed prior to PF3...I was assuming PF3 would have overwritten it, am I wrong?
So I'm waiting for MSFS to load so I lookedup FSX Traffic 360 and this section was on the page - you might want to look into that to see why Turkish aircraft are showing up for you.
From the Traffic360 webpage:
Introducing The Traffic Control Centre and Other Features
As one of the most enjoyable additions brought to the table so far in this set, this remake of the Traffic Control Centre (TCC) is something to definitely remember about.
Now, you can easily expand and change AI traffic to fit the help that you need and the control that you require in the long-term. If you want to learn about all of this and fully understand the direction you are heading in, then you can utilize the TCC to help you control various flights and compilations to your preference.
Now, you can use Correct Identifiers to help control all of your flights as they now use tail numbers and unique IDs to ensure they are matched up to a country of origin. This improves the overall feel of realism of the entire process, making it much easier to enjoy.