unicode.md

@@ -68,6 +68,14 @@ Some things we could do:
 If Unicode is allowed, should its use be restricted, e.g. to character and string literals?
 
 
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+What about supporting scripts where characters are written right-to-left instead of left-to-right.  In theory, you still have a simple sequence of characters, but what about mixing L-to-R and R-to-L scripts, e.g. the spelling of language keywords?  Should 'module' be spelled 'eludom' in a R-to-L encoding?  Or is this just a text-editor/visualisation problem that does not concern the language standard?  (Note that, for instance in Arabic script, words are R-to-L but numbers are L-to-R.)
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+Unicode has varying-width space characters (m-width, n-width, l-width, non-breaking space, narrow non-breaking space, zero-width non-breaking space…)  How do these interact with the layout rules?
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 ## The Char type