Foreign buyers usually research property in Turkey from home, on their phone. The English pages should clearly show floor plans, sizes, location and transport, the delivery schedule and how to get in touch. For buyers in another time zone, WhatsApp is easier than a phone call.
German, Russian or Arabic pages can be added; each extra language adds roughly 25%. Title deeds, valuation and legal questions around selling to foreigners need specialists; the site covers them as general information and points buyers to your advisers.