A double plural is a plural form to which an extra suffix has been added, mainly because the original plural suffix (or other variation) had become unproductive and therefore irregular. So the form as a whole was no longer seen as a plural, an instance of morphological leveling. For example, if "geese" (the plural) became the word for "goose" (the singular) in a future version of English, a word geeses might become the licit plural form. Likewise, "peoples" in English currently means "nations or ethnic groups" but is sometimes used informally as a plural of "person" (eg, "these peoples standing here").