$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', '/(qu