$plurals public static property
The rules for converting a word into its plural form. The keys are the regular expressions and the values are the corresponding replacements.
public static array $plurals = ['/([nrlm]ese|deer|fish|sheep|measles|ois|pox|media)$/i' => '\1', '/^(sea[- ]bass)$/i' => '\1', '/(m)ove$/i' => '\1oves', '/(f)oot$/i' => '\1eet', '/(h)uman$/i' => '\1umans', '/(s)tatus$/i' => '\1tatuses', '/(s)taff$/i' => '\1taff', '/(t)ooth$/i' => '\1eeth', '/(quiz)$/i' => '\1zes', '/^(ox)$/i' => '\1\2en', '/([m|l])ouse$/i' => '\1ice', '/(matr|vert|ind)(ix|ex)$/i' => '\1ices', '/(x|ch|ss|sh)$/i' => '\1es', '/([^aeiouy]|qu)y$/i' => '\1ies', '/(hive)$/i' => '\1s', '/(?:([^f])fe|([lr])f)$/i' => '\1\2ves', '/sis$/i' => 'ses', '/([ti])um$/i' => '\1a', '/(p)erson$/i' => '\1eople', '/(m)an$/i' => '\1en', '/(c)hild$/i' => '\1hildren', '/(buffal|tomat|potat|ech|her|vet)o$/i' => '\1oes', '/(alumn|bacill|cact|foc|fung|nucle|radi|stimul|syllab|termin|vir)us$/i' => '\1i', '/us$/i' => 'uses', '/(alias)$/i' => '\1es', '/(ax|cris|test)is$/i' => '\1es', '/s$/' => 's', '/^$/' => '', '/$/' => 's']
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