Thanks @ecom for the information here and in previous posts. I agree that the USCIS and NVC instructions are generally clear and folks should follow those as closely as possible. It is also helpful to hear from our friends here on the forum, recognizing each case is different and that some cases are much more complex then others (and sometimes mistakes are made).
With regards to the police certificate, since the English version doesn't translate everything on the page (i.e., the QR code explanation box), it seems the safest thing to do is upload the Turkish language version. NVC clearly state they accept English or Turkish language documents, so submitting only Turkish documents from appropriate sources (e.g., E-Develt) should be sufficient.