Erdogan wants people to call Turkey "Türkiye" even in English and other languages

[Santander]

Barring subsequent reversals, I believe that the new name will probably be the standard across most of the English-speaking world by the late 2020s (just like how Mumbai has now displaced Bombay).

Mumbai has far from displaced Bombay. Even in India, many people still say Bombay, and certainly among the diaspora, Bombay is highly-prevalent. It's not a great comparison anyway, since Mumbai rolls off the tongue just as easily as Bombay for an English speaker. A better comparison would be Bengaluru.

[Santander]

Why not rebrand as Turkia, a la Czechia? It approximates the Turkish pronunciation, while being approachable for English speakers. Perhaps the etymology is too Western for Erdogan's taste, but we're not talking about changing the Turkish name for the country.

[Santander]

Well Ivory Coast no longer exists and it's now Cote d'Ivoire. Ditto East Timor/Timor-Leste. It's hardly particular to Turks.

No one in Finland calls the country Cote d'Ivoire. It's still "Norsunluurannikko", which means "Ivory Coast".

Good for the Finns. But the country's name has become Cote d'Ivoire, even for English speakers.

Lol, no. Everyone still says Ivory Coast.