Merge pull request #3456 from MetaMask/i18n

Add i18n

1 files changed, 18 insertions, 0 deletions

diff --git a/docs/translating-guide.md b/docs/translating-guide.md
new file mode 100644
index 000000000..62d444b5a
--- /dev/null
+++ b/docs/translating-guide.md
@@ -0,0 +1,18 @@
+# MetaMask Translation Guide
+
+The MetaMask browser extension supports new translations added in the form of new locales files added in `app/_locales`.
+
+- [The MDN Guide to Internationalizing Extensions](https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Internationalization)
+
+## Adding a new Language
+
+Each supported language is represented by a folder in `app/_locales` whose name is that language's subtag ([look up a language subtag using this tool](https://r12a.github.io/app-subtags/)).
+
+Inside that folder there should be a `messages.json` file that follows the specified format. An easy way to start your translation is to first duplicate `app/_locales/en/messages.json` (the english translation), and then update the `message` key for each in-app message.
+
+That's it! When MetaMask is loaded on a computer with that language set as the system language, they will see your translation instead of the default one.
+
+## Testing
+
+To verify that your translation works, you will need to [build a local copy](https://github.com/MetaMask/metamask-extension#building-locally) of MetaMask.
+