Function init 

pub fn init(new_lang: &str) -> Result<(), Error>

Set the language for the program

Examples

To set the program in french

extern crate rtr;

match rtr::init("fr"){
    Ok(_) => (),
    Err(e) => panic!("couldn't load the fr translation file, error {}", e),
};

Don’t forget that it will need the ./lang/fr.txt file

Errors

Will return an std::io:Error in case of trouble loading the translation file