, download Noto Sans CJK TC font, extract and copy the following 3 Chinese fonts to iGO/ui_nextgen/fonts. If your iGO Nexgen is installed in iGO_Gift, iGO_Basar instead of iGO, just replace the folder name.
default="Noto Sans CJK TC, Light"
defaultbd="Noto Sans CJK TC, Medium"
defaultit="Noto Sans CJK TC, Thin"
* The same trick can be used to replace default, defaultbd, and defaultit fonts with Unicode Arial font for displaying Eastern Europe characters. The default font used in iGO Nextgen (Avic, Basar, Gift) is not suitable to use in those countries.