How can I modify cities label text?

[JeffPeng26]

I found that there is something wrong in Taiwan's city label.
missing all the '縣' city name
how can I add it or modify it?

[Ombrenoirz]

Since it's using OpenStreetMap data, I don't think there's an easy way to costumize label. It gets its source from planet json which take his source from OFM server tiles PBF file from this x/y/z link. But here you can edit most of the style of the map.

Example you can only display the language you want. For each label type, change:
"text-field": [ "case", ["has", "name:nonlatin"], [ "concat", ["get", "name:latin"], "\n", ["get", "name:nonlatin"] ], [ "coalesce", ["get", "name_en"], ["get", "name"] ] ],

It goes like this: "If name is not latin, display latin + non-latin. Else display in english". In the editor if you change the view to "Inspect", you can see the name of each label in each available language. You can get the language code from there. After that you can export the json, and upload it in your application.

For Taiwan, correct me if I'm wrong, but the map doesn't show any county. Only cities that has the same name. Ending in '市'.