diff --git a/.tx/config b/.tx/config
new file mode 100644
index 000000000..7cb58dfed
--- /dev/null
+++ b/.tx/config
@@ -0,0 +1,16 @@
+[main]
+host = https://www.transifex.com
+minimum_perc = 20
+lang_map = pt_BR: pt-rBR, pt_PT: pt-rPT
+
+[mapbox-plugins-for-android.plugin-offline-strings-file]
+file_filter = plugin-offline/src/main/res/values-<lang>/mapbox_strings.xml
+source_file = plugin-offline/src/main/res/values/mapbox_strings.xml
+source_lang = en
+type = ANDROID
+
+[mapbox-plugins-for-android.plugin-places-strings-file]
+file_filter = plugin-places/src/main/res/values-<lang>/strings.xml
+source_file = plugin-places/src/main/res/values/strings.xml
+source_lang = en
+type = ANDROID
\ No newline at end of file
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5e37859d3..27b10082b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -15,6 +15,22 @@ We welcome contributions to this plugin repository. If you're interested in buil
 
 - Finally, once you're ready to share your code, list your plugin in this file and then open a PR for the `@mapbox/android` team to review.
 
+## Adding or updating a localization
+
+The Mapbox Plugins SDK for Android features several translations contributed through [Transifex](https://www.transifex.com/mapbox/mapbox-plugins-android/). If your language already has a translation, feel free to complete or proofread it. Otherwise, please [request your language](https://www.transifex.com/mapbox/mapbox-plugins-android/) so you can start translating. Note that we’re primarily interested in languages that Android supports as system languages.
+
+While you’re there, please consider also translating the following related projects:
+
+* [OSRM Text Instructions](https://www.transifex.com/project-osrm/osrm-text-instructions/), which the Mapbox Directions API uses to generate textual and verbal turn instructions ([instructions](https://github.com/Project-OSRM/osrm-text-instructions/blob/master/CONTRIBUTING.md#adding-or-updating-a-localization)).
+* [Mapbox Navigation SDK for iOS](https://www.transifex.com/mapbox/mapbox-navigation-ios/), the analogous library for iOS applications ([instructions](https://github.com/mapbox/mapbox-navigation-ios/blob/master/CONTRIBUTING.md#adding-or-updating-a-localization)).
+* [Mapbox Maps SDK for Android](https://www.transifex.com/mapbox/mapbox-gl-native/), which is responsible for the map view and minor UI elements such as the Mapbox Telemetry permissions dialog
+
+Once you’ve finished translating the Android Plugins SDK into a new language in Transifex, open an issue in this repository asking to pull in your translations. You can also pull in the translations yourself:
+
+1. Create a new branch that will contain the new translations.
+1. _(First time only.)_ Download the [`tx` command line tool](https://docs.transifex.com/client/installing-the-client) and [configure your .transifexrc](https://docs.transifex.com/client/client-configuration).
+1. Run `tx pull -a` to fetch translations from Transifex. You can restrict the operation to just the new language using `tx pull -l xyz`, where _xyz_ is the language code.
+1. Commit any new files that were added and open a pull request with your changes.
 
 # Code of conduct
 Everyone is invited to participate in Mapbox’s open source projects and public discussions: we want to create a welcoming and friendly environment. Harassment of participants or other unethical and unprofessional behavior will not be tolerated in our spaces. The [Contributor Covenant](http://contributor-covenant.org) applies to all projects under the Mapbox organization and we ask that you please read [the full text](http://contributor-covenant.org/version/1/2/0/).