problem with Geany language

[Botanic]

Hi,
i'm in an attempt to build a new version of geany in french, since the translation has been completed not long ago
i am told that the language is hinted with the locale

i've downloaded the latest source (0.13) and the latest french translation file (fr.po).
before compiling i set the locale this way:
export LANG=fr
the compiling and installing steps ok (actually all "/LC_MESSAGES/geany.mo" files for the different languages are built, in /usr/share/locale)

but then, when i start geany the interface is still in english.
i do get a message explaining the reason, but i don't understand it

Code: Select all

(geany:13157): Gtk-WARNING **: Locale not supported by C library.
        Using the fallback 'C' locale.

what did i do wrong? btw, is that ok to compile french apps in an "english" environment? i have a fully functional puppy with all dev tools, i don't really want to set up another one in french just for compiling french apps. does that makes sense?
any help is welcome !

Botanic