IPFire is available in many languages. For development and for the code itself, we use English as default. But of course is the user interface completely localized for many other languages as well. For that we use a service called Transifex.
On Transifex there are many software components of IPFire to translate. They have a very easy to use user interface and everyone can join the translation teams and just start translating within minutes. In the upcoming release of IPFire 2.17, the installer and setup tools have been migrated to Transifex. Now you can translate them very easily to your own language.
So please join the language teams on the site linked below and help us to make IPFire more accessible for more people: