Localisation of UI unavailable on MacOS X

Several people discovered that automatic change of UI
language according to the system settings does not work
on MacOS X.

So far, this has been tested on machine with OS X
version 10.4.6 and language localisations cs_CZ, sk_SK
and fr_FR. And Inkscape version 0.44. For the test has
been used tips from FAQ, rewriting of

export "LANG=`grep \"\`defaults read .GlobalPreferences
AppleCollationOrder \
        2>&1\`_\" /usr/share/locale/locale.alias | tail
-n1 | sed 's/\./
/' | \
        awk '{print $2}'`.UTF-8"
to
 export LANG=cs_CZ.UTF-8 (and several others)

and also test by simple running following commands in
terminal:

$ LANG=cs_CZ
$ /Applications/Inkscape.app/Contents/MacOS/Inkscape

The last tested command returned:

(inkscape-bin:16919): Gtk-WARNING **: Locale not
supported by C library.
        Using the fallback 'C' locale.

I guess that binary for mac os x had not been built
with lproj file(as written in FAQ - testing locales
section) specifying languages for project and that made
localisations unavailable.

If there are any other tips to try, I would be glad to
know them and forward to test. (I am afraid that user
who reported this to translators group is not familiar
with Mac OS X enough to compile Inkscape by himself.)