Why LANG variable doesn't change the language?

[Yuri]

Boris Samorodov wrote:
> Delete firefox3-i18n package (www/firefox3-i18n port) and install
> firefox35-i18n package (www/firefox35-i18n port).
>   

This works. Thanks!
But still LANG variable isn't used. Instead there is a FF-specific way: 
through Tools->Quick Locale Switcher menu. Not clear why this is 
dependent on the OS (in Linux it's still LANG variable). Maybe it's the 
option of FF build process that was chosen differently.

Yuri