No prob, here is more explicit :)

If you keep reading up to section http://perldoc.perl.org/perldata.html#Identifier-parsing it says 

     / (?[ ( \p{Word} & \p{XID_Start} ) + [_] ])
    (?[ ( \p{Word} & \p{XID_Continue} ) ]) * /x

[download]
and \p{Word} is unicode word chars ... if you lookup Unicode Character 'GLOBE WITH MERIDIANS' (U+1F310) its categorized as symbol not word

In reply to Re^3: "Unrecognized character" while use utf8 is in effect (perldata/Identifier parsing) by Anonymous Monk
in thread "Unrecognized character" while use utf8 is in effect by AppleFritter

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