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-# Notice
+# Contributing to the translated content of MDN Web Docs
 
-**This content is not open for contributions. It's a frozen snapshot
-of the translated content from wiki.developer.mozilla.org.**
+:tada: First of all, thanks for taking the time to contribute to
+[MDN Web Docs](https://developer.mozilla.org)’ translated content! :tada:
 
-Unlike the [mdn/translated-content-rendered](https://github.com/mdn/translated-content-rendered)
-this content is in its raw HTML form.
-The purpose of this repository is to experiment with uplifting all translated
-content and have its kumascript macros rendered on every build.
+The following is a set of guidelines for contributing to the
+[translated content of MDN Web Docs](https://github.com/mdn/translated-content), which is
+hosted within the [MDN Organization](https://github.com/mdn) on GitHub.
+
+## Tier 1 locales
+
+Before we go any further, you should be aware that we are only accepting updates
+to active locales — this means locales that have active community maintenance
+teams in place to review PRs, fix issues, make updates, etc. Currently the list
+of active locales is:
+
+ - `fr`
+ - `ja`
+ - `zh` (`zh-CN` and `zh-TW`)
+
+If you want to just find a task and jump in, search by the labels `l10n-fr`,
+`l10n-ja`, and `l10n-zh` in this repo’s [issues list](https://github.com/mdn/translated-content/issues),
+or the main [content repo issues](https://github.com/mdn/content/issues)
+
+If you want to find out more about our community maintenance teams, see
+[localizing MDN](https://developer.mozilla.org/en-US/docs/MDN/Contribute/Localize).
+If you want to ask questions or talk to us about forming a new community
+maintenance team, see [ask for help](https://developer.mozilla.org/en-US/docs/MDN/Contribute/Getting_started#step_4_ask_for_help).
+
+## Code of Conduct
+
+Everyone participating in this project is expected to follow our
+[Code of Conduct](CODE_OF_CONDUCT.md).
 
 ## License
 
-[See LICENSE.md](LICENSE.md).
+When contributing to the content you agree to license your contributions
+according to [our license](LICENSE.md).
+
+## Making contributions
+
+A good place to learn about general guidelines for contributing to
+[MDN Web Docs](https://developer.mozilla.org) is the
+[Guidelines document](https://developer.mozilla.org/en-US/docs/MDN/Guidelines).
+For example, you can find out more about MDN's writing-style guidelines via the
+[Writing style guide](https://developer.mozilla.org/en-US/docs/MDN/Guidelines/Writing_style_guide).
+
+### Setting up to edit
+
+This repo has exactly the same folder structure, concepts, and commands
+available to it as the [content repo](https://github.com/mdn/content), which
+holds all of MDN's English content. The main difference is in the setup you need
+to do before you can start editing. It is mostly the same, but there is a little
+bit more to consider.
+
+To begin with, get the basic required tooling set up, as described in the
+[content repo Setup section](https://github.com/mdn/content#setup).
+
+Now you need to fork and clone both the [content repo](https://github.com/mdn/content)
+and the translated-content repo (this repo).
+
+### Content repo setup
+
+ 1. Once the above is done, cd into the content repo.
+
+ 1. Run the command `yarn install` to fetch the latest packages and get the local
+   MDN testing environment set up. It is also recommended that you run
+   `yarn install` before every update you do to the source, to make sure you
+   have the latest packages.
+
+ 1. Next, create an environment variable called `CONTENT_TRANSLATED_ROOT`, which
+   points to the path to the translated-  content repo’s `files` directory. You
+   could do this for a single session like so:
+
+   export CONTENT_TRANSLATED_ROOT=/path/to/translated-content/files
+
+   But you’ll have to newly-set this every time you open up a new terminal
+   window. Instead, you could put the environment variable setting in an `.env`
+   file in the root of your content repo. This is most easily done using the
+   following command:
+
+   echo CONTENT_TRANSLATED_ROOT=/path/to/translated-content/files >> .env
+
+   (the `.env` file will be created for you if it does not already exist.)
+
+ 1. Now you’ve got this set up, enter the command `yarn start` to begin the local
+   testing server running at `localhost:5000`.
+
+### Working in the translated-content repo
+
+Over in the translated-content repo, decide what change you want to make, and
+then:
+
+ 1. Create a new branch to make your changes in.
+
+ 1. Switch to your new branch and make the changes you want to make. You can
+   keep going back to `localhost:5000` to test your changes and make sure the
+   content looks how you want it to look.
+
+ 1. When you are satisfied with your changes, create a pull request and one of
+   our review teams will review it.
+
+### For more info on editing this repo
+
+For more information, we’d like to suggest that you go to the [content repo](https://github.com/mdn/content)
+and read its README file, particularly to learn about [fundamental concepts](https://github.com/mdn/content#fundamental-concepts),
+[pull request etiquette](https://github.com/mdn/content#pull-request-etiquette),
+and common actions such as [adding](https://github.com/mdn/content#adding-a-new-document),
+[moving](https://github.com/mdn/content#moving-one-or-more-documents), or
+[deleting](https://github.com/mdn/content#deleting-a-document) documents.
+
+## Policies for active community maintenance teams
+
+### Reviewing and issue queue
+
+It is the responsibility of the active community maintenance team for each
+active locale to keep up-to-date with reviews of pull requests and handling
+issues filed against that locale. You can filter the relevant pull requests and
+issues for each locale using the relevant label — `l10n-fr`, `l10n-ja`,
+and `l10n-zh`.
+
+The review teams for each locale are:
+
+ - French (`fr`) content — the [@yari-content-fr](https://github.com/orgs/mdn/teams/yari-content-fr) team,
+   which consists of:
+   - [@nicolas-goudry](https://github.com/nicolas-goudry)
+   - [@JNa0](https://github.com/JNa0)
+   - [@tristantheb](https://github.com/tristantheb)
+   - [@LEMIBANDDEXARI](https://github.com/LEMIBANDDEXARI)
+   - [@SphinxKnight](https://github.com/SphinxKnight)
+ - Japanese (`ja`) content — the [@yari-content-ja](https://github.com/orgs/mdn/teams/yari-content-ja) team,
+   which consists of:
+   - [@mfuji09](https://github.com/mfuji09)
+   - More TBD
+ - Chinese (`zh-CN` and `zh-TW`) content — the [@yari-content-zh](https://github.com/orgs/mdn/teams/yari-content-zh) team, which consists of:
+   - [@t7yang](https://github.com/t7yang)
+   - [@dibery](https://github.com/dibery)
+   - [@irvin](https://github.com/irvin)
+
+### Requirements for keeping locales up-to-date
+
+Active community maintenance teams are expected to keep their locales maintained
+and reasonably up-to-date. This means:
+
+ - Reviewing and actioning all pull requests within 2 weeks.
+ - Triaging and fixing all actionable issues within 1 month.
+ - Making reasonable progress on keeping MDN’s tier 1 content (definition TBD)
+   synchronized with the `en-US` versions. This means some progress should be
+   made each week, e.g. updating an article to be in sync with the English
+   version, removing or fixing a bad quality article…
+
+If no progress is made on a locale in these areas within 1 month, the locale
+will be considered inactive, and edits will stop being accepted.