string no aviable to transllate: new @item

thanks a lot for your module :)
sorry for my english (i hope you understand, if not, please, tell to me)

i have to translate your module to spanish and i found a very small bug:
i use l10n_client module to translate the interface and one string is not avoidable.
the string is when you create a new term on the taxonomy in the default value for the titlle.
the string is in hierarchical_select.module in line 603.
i have not enough knowledge to submit a patch, sorry :)

       $element['hierarchical_select']['create_new_item']['input'] = array(
          '#type' => 'textfield',
          '#size' => 20,
          '#maxlength' => 255,
          '#default_value' => t('new @item', array('@item' => $item_type)), //this line is 603
          '#attributes' => array(
            'title' => t('new @item', array('@item' => $item_type)),
            'class' => 'create-new-item-input'
          ),

if i found any other string, is it ok that i report here?

and one question, how do i submit the translation in case you are interested?