sFire has a built-in translation system. You can create new translation files and define a language in the controller. In the view you can translate text automatically using the @translate method:
@translate('Hello') //Could output "Hi"
If you are using variables in your text, you can replace placeholders with variables given as an Array as second parameter. This will follow the rules of the sprintf function of PHP.
@translate('Hello, testing 1, %s, %s', [2', '3']) //Could output "Hi, testing 1, 2, 3"
To user another language for a specific text, you can use the third parameter to set the language just for this text
@translate('Hello', null, 'en') //"en" is in this case an acronym for "English"
Look at the translation section to create translation files and know how to use them.