The builtin default vector font only include a limited number of characters. It doesn’t include special characters. To fix this there’s an option to select a more robust font.

In the Dot Labels section of your globe you’ll find the Font Typeface option:

Changing it to another option should help fixing most of the special characters issues. However, it doesn’t include all characters, from other alphabets, like greek, cyrillic, hebrew or arabic, among others. For these we hope to include in the future an option to custom upload a font typeface.