Honestly nope. I didn't make FreePBX - I just installed it like everybody else.
BUT...I read further down...and....
On June 4th, 2009 mickecarlsson (Developer) said:
The above "fix" is not the proper way to do it. Please check your systems locale so that all languages are installed.
Try this
locale -a
You should get a lot of languages listed. If not do
locale-gen hu_HU
If that does not fix is then install additional languages
apt-get install language-*-base
locale-gen
Have a read further in that posting, looks promising perhaps? What does the 'locale-gen' do? Does that change the default language?