gcc-4.6.3 installs these items on my system which has LINGUAS="en_GB en cs sk ja": /usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/locale/de /usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/locale/de/LC_MESSAGES /usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/locale/de/LC_MESSAGES/libstdc++.mo /usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/locale/fr /usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/locale/fr/LC_MESSAGES /usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/locale/fr/LC_MESSAGES/libstdc++.mo Reproducible: Always
*** Bug 487118 has been marked as a duplicate of this bug. ***
This seems to be fixed.