And I see no significant font using Amiri — % !TeX Program=Ini-XeTeX
\catcode `\ = 10 \catcode `\ = 10 \catcode `\{ = 1 \catcode `\} = 2 \catcode `\^ = 7 \font \tenrm = "Amiri" \tenrm \lccode "200D = "200D \patterns {^^^^200d1^^^^200d} \def \showhyphens { \setbox 0 = \vbox { \parfillskip = 0 pt \hsize = \dimen 10 \tenrm \pretolerance = -1 \tolerance = -1 \hbadness = 0 \showboxdepth = 0 \ #1 } } \lccode "200D = "200D \catcode "200D = 11 bla^^^^200d^^^^200dbla \showhyphens {bla^^^^200d^^^^200dbla} \end