Questions for NiLuJe:
The font hack mainly uses I18N.ttf and code2000.ttf to handle Arabic. But these 2 fonts have valid glyphs for Arabic Unicode range (x0600---x06XX). Now my question is from which other font do the squared fallback glyps come? I checked almost all of the fonts on this font-hack folder and they either have some valid Arabic glyphs there or nothing at all (empty), but not any square-coded fallback glyphs.
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