i18next
i18next internationalization framework
react-i18next
Internationalization for react done right. Using the i18next i18n ecosystem.
y18n
the bare-bones internationalization library used by yargs
vue-i18n
Internationalization plugin for Vue.js
react-intl
Internationalize React apps. This library provides React components and an API to format dates, numbers, and strings, including pluralization and handling translations.