diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d9f3bfd..348fb19 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,3 +5,19 @@ If you would like to contribute code, please submit a Pull Request with the chan
 Please use [eslint](https://eslint.org/) to ensure your code is in a similar style to the rest before submitting your PR. A `eslintrc.json` file is included in the repo.
 
 I will likely merge your PR if it works as intended and does not break other features.
+
+# Translation / i18n
+
+The current english text is in ./extension/\_locales/en-US/messages.csv
+
+The file has 3 columns:
+
+1. The id of the text. Must remain the same for all languages.
+2. The actual text. Must be translated.
+3. A description of the text. May contain translations notes, or be left alone.
+
+The translated file should be stored in ./extension/\_locales/{COUNTRY CODE}/messages.csv for the pull request.
+
+## Building Translation File
+
+Run `npm run build:i18n {COUNTRY CODE}` to build the messages.json. Ex: `npm run build:i18n en-US`