Zola

Zola is a localization tool to make easy translations and localize your projects.

There are three step to use:

1. As a developer, you can create your localization keys.
2. As a product manager or person who responsible for translations, you can manage your keys.
3. The final step you can develop your localization files.

The project is open-source you can check it out with here.

There are 3 types of pricing: discover, project, and team usage. Discover model is free one.

I think localization is a complicated and annoying job on project development. This tool organizes and eases all the stuff for you or your team.