Adding New Word in traslation module

[mkfanregistro@gmail.]

I have a multilingue store and I need to add a new word in my teme

as I read just add a:
 

{l s='new word' } or {l s='new word' mod='module name' } or {l s='new word' d='Path' }

 and I should see a new field in the prestashop bo translation form

but something does not work, forget some steps?

AS test I copy a existing translation section but not work

not-found.tpl

 <h4>{l s='Sorry for the inconvenience.' d='Shop.Theme.Global'}</h4>
  <h4>{l s='Sorry for the inconvenience2.' d='Shop.Theme.Global'}</h4>( My Test)

I would have expected to see "Sorry for the inconvenience2"