Spanish Pluralizer is a gem for converting singular spanish nouns into plural. It works by adding the following methods to String: [:pluralize_spanish, :spanish_pluralizer_acute, :spanish_pluralizer_unacute, :spanish_pluralizer_is_acute?]. It can handle diphthong, hiatus and adding or removing acutes, but fails with monosyllables and rule exceptions like "régimen" => "regímenes" and "espécimen" => "especímenes".