=item *
Many languages, such as Chinese, are caseless. Perl now knows about
-most modern commercially important ones, and skips much of the work when
+most common ones, and skips much of the work when
a program tries to change case in them (like C<ucfirst()>) or match
caselessly (C<qr//i>). This will speed up a program, such as a web
-server, that can operate on multiple languages, while operating on a
+server, that can operate on multiple languages, while it is operating on a
caseless one.
=item *