private function addUsedIndex(string $index)
    {
        // add user index and detect default translate (default: index == translate)
        $this->listUsedIndex[$index] = (isset($this->dictionary[$index]) && $this->dictionary[$index] != $index);
    }
private function addUsedIndex(string $index)
    {
        // add user index and detect default translate (default: index == translate)
        $this->listUsedIndex[$index] = (isset($this->dictionary[$index]) && $this->dictionary[$index] != $index);
    }
private function addUsedIndex ( string $ index ) { // add user index and detect default translate (default: index == translate) $ this -> listUsedIndex [ $ index ] = ( isset ( $ this -> dictionary [ $ index ] ) && $ this -> dictionary [ $ index ] != $ index ) ; }
Add used index.

@internal
@param string $index
Add used index .