RHEL 6.3 でのsedの試行:
$ export LC_ALL=fr_FR.utf-8
$ sed 's/ \([a-zA-Zé]\)\([^ ]*\) /[\u\1\L\2\E] /g' <<< " hélène NOËL étienne "
hélène NOËL étienne
$ export LC_ALL=C
$ sed 's/ \([a-zA-Zé]\)\([^ ]*\) /[\u\1\L\2\E] /g' <<< " hélène NOËL étienne "
[Hÿlÿne] [Noÿl] [ÿtienne]
$ sed --version
GNU sed version 4.2.1
[...]
sedは以下を出力できますか?
[Hélène] [Noël] [Étienne]