@Suty I have already asked that to open street map and they say the issue is on the windy not open street map. Which locals are you talking about? Türkiye republic accept the name of izmit as nikomedia? In order to prevent from mistakes while synchronizing data from open street map you should do a good engineering and you cannot keep your mistakes by afraid of that. Local Türkiye authorities also does not call Kocaeli as nikomedia that you should fix. The other country authorities does not my issue, it is your issue.
https://help.openstreetmap.org/questions/84905/izmit-seems-nikomedia