How to submit a new translation (or to update an old one)

First of all, thank you for your help, I really need it! To submit a new translation (or to update an old one):

1. Fork the repository
2. Open the src/locales.js file with your code editor and find the translation
3. Please translate all the values (that are all mandatory), then commit and push your changes to your repo.
4. Open a pull request 🎉

If the language is not already present on JGC, use the right ISO 639-1 language code.