ttag
Simple approach for javascript localization
...Just tag your strings to make them translatable. Use a simple ttag-cli tool for translation extraction. Can be easily integrated with almost any workflow as it uses the babel-plugin for string extraction. Can be easily used with the typescript. Allows you to place translations into the sources on a build step. Gettext is a simple localization format with a rich ecosystem. Ttag has support for plurals, contexts, translator comments, and much more.