public function setFallbackLanguage($language)
    {
        if ( $this->isSupported($language) ) {
            $this->fallbackLanguage = $language;
        }
        else {
            throw new RuntimeException('Variable must be one of the supported languages.');
        }

        return $this;
    }
public function setFallbackLanguage($language)
    {
        if ( $this->isSupported($language) ) {
            $this->fallbackLanguage = $language;
        }
        else {
            throw new RuntimeException('Variable must be one of the supported languages.');
        }

        return $this;
    }
public function setFallbackLanguage ( $ language ) { if ( $ this -> isSupported ( $ language ) ) { $ this -> fallbackLanguage = $ language ; } else { throw new RuntimeException ( 'Variable must be one of the supported languages.' ) ; } return $ this ; }
Set the fallback language

Must be one of the supported languages.

@param string $language The fallback language.

@return self

@throws RuntimeException if the variable isn't a supported language
Set the fallback language