Top 8 pluralization open source projects

Pluralize or singularize any word based on a count

Pluralize and singularize any word (golang adaptation of https://www.npmjs.com/package/pluralize)

Utilities for English-language quirks in Julia

Minimalist gettext style i18n for JavaScript

Powerful Swift string localization library with support for pluralization and string interpolation.

Internationalization and localization in Typescript with Unicode CLDR, batteries included

Pluralization of Russian words

Склонение существительных по падежам. Обычно требуются только форма в именительном падеже, одушевлённость и род.