The fonts will stay on your computer and are processed locally in the browser.
They will NOT be uploaded to any server or be send away otherwise.
These are characters that appear in the CLDR data as needed for
some languages, but we decided that they are not exactly needed
for language support. Don't just trust this list blindly and if
something is terribly wrong for a language, please complain!
Size of Glyph-SetSupported Languages (laxly):
Font Coverage Info
The font supports
direct languages of this charset and
languages including inherited languages.
The font covers
% glyphs of this charset.