As a Turkish citizen I can say that the real inflation is much higher than 17% but they are trying to make it look lower by changing the formula constantly so they don't have to raise government employee's salaries so much. I would say the real inflation is closer to 50%.
I didn't do much research so lets assume you are right but at the same time I hope you do not confuse asset prices with consumer prices. The PCI in the USA is correct and people still cry that it is manipulated.
If the government is under reporting inflation that is a problem with the government. The obvious solution is to just report correct inflation. Once the government has reported correct inflation numbers the Turkish central bank must raise interest payments and that would mean at least 52% interest. The fundamental problem doesn't change though. People are still fleeing the influence of the Turkish government, not the currency. You need to trust the government and the government must eliminate internal corruption.
There is nothing wrong with charging different prices for different countries. The problem is I'm living in Turkey most of the time and my bank is a Turkish bank but I have been charged in Polish Zloty all these time. I don't think they would let me pay less if I created my account in a country 2 years ago where price was 2,5 times cheaper than my original country.
The letter Q was never illegal in Turkey. It was just not allowed to be used in names of people/companies etc. due to the fact that it is not in Turkish alphabet.
Häagen-Dazs has always been allowed to operate in Turkey as well as Quiznos Sub and others.
If you wanted a local company, yes, you were only allowed to use Turkish letters in the official name. They didn't actually care what you actually wrote on your signs though.
Official names being Turkish is important because otherwise officials would have needed to be capable of working with all characters in the universe.
I don't think using "the wrong letters" is illegal in the US. What I've meant was it is as wrong as claiming the usage of "the wrong letters" is illegal in the US.