If you want to create a language file in your native language you have to follow these steps:
If your are done you may test it in your own IPFire system:
en:English:Englisch de:German:Deutsch fr:French:Französisch fa:persian:Farsi
perl -e "require '/var/ipfire/lang.pl'; &Lang::BuildCacheLang"
If you have changed the language and you get an Internal Server Error when you try to reach the webinterface, then there is something wrong in your language file. With the command:
your are able to read out what is wrong.
To get the webinterface back to work, you may edit the file: /var/ipfire/main/settings. There you will find a line starting with LANGUAGE=. Just get back to english language by entering:
and all will work fine again.