Texts are shown as corrupted once I change the theme to use custom fonts for Russian

Hi,

I noticed that once I set the custom font to true but Arial is still used, the installer will not be able to display the text correctly in other non ascii languages, e.g. Russian/Simplified Chinese.

I displayed the text on the preload event of every page using using like

tblSysLang = System.GetDefaultLangID();
tblUserLang = Application.GetInstallLanguage();

local strCancel = SetupData.GetLocalizedString("RZMSG_CANCEL");
DlgButton.SetProperties(CTRL_BUTTON_NEXT, {Text = strNext});

How do I set the font base on different language OS and what are the font that I should use?