Plural

==Formation of plurals==
A given language may make plural forms of nouns by various types of [[inflection]], including the addition of [[affix]]es, like the English ''-(e)s'' and ''-ies'' [[suffixes]], or [[ablaut]], as in the derivation of the plural ''geese'' from ''goose'', or a combination of the two. Some languages may also form plurals by [[reduplication]], but  not as productive. It may be that some nouns are not marked for plural, like ''sheep'' and ''series'' in English. In languages which also have a [[grammatical case|case]] system, such as [[Latin]] and [[Russian language|Russian]], nouns can have not just one plural form but several, corresponding to the various cases.  The inflection might affect multiple words, not just the noun; and the noun itself need not become plural as such, other parts of the expression indicate the plurality.

In English, the most common formation of plural nouns is by adding an ''-'''s''''' suffix to the singular noun. (For details and different cases, see [[English plurals]]). Just like in English, noun plurals in French, Spanish and Portuguese are also typically formed by adding an ''-s'' suffix to the lemma form, sometimes combining it with an additional vowel. (In French, however, this plural suffix is often not pronounced.) This construction is also found in German and Dutch, but only in some nouns. Suffixing is cross-linguistically the most common method of forming plurals.

In Welsh, the reference form, or default quantity, of some nouns is plural, and the singular form is formed from that, eg ''llygod'', mice; ''llygoden'', mouse; ''erfin'', turnips; ''erfinen'', turnip.