chore: update README

Localization/README.md

@@ -1,20 +1,23 @@
 # Localization
+[![Crowdin](https://badges.crowdin.net/mastodon-for-ios/localized.svg)](https://crowdin.com/project/mastodon-for-ios)
 
 Mastodon localization template file
 
 
 ## How to contribute?
 
-TBD
+Please use the [Crodwin](https://crowdin.com/project/mastodon-for-ios) to contribute. If your language is not in the list. Please feel free to open the issue.
 
 ## How to maintains
 
+The project use a script to generate Xcode localized strings files.
+
 ```zsh
 // enter workdir
 cd Mastodon
-// edit i18n json
-open ./Localization/app.json
-// update resource
-update_localization.sh
 
+// merge PR from Crowdin bot
+
+// update resource
+./update_localization.sh
 ```

README.md

@@ -1,4 +1,7 @@
 # Mastodon
+[![CI](https://github.com/mastodon/mastodon-ios/actions/workflows/main.yml/badge.svg)](https://github.com/mastodon/mastodon-ios/actions/workflows/main.yml) [![Crowdin](https://badges.crowdin.net/mastodon-for-ios/localized.svg)](https://crowdin.com/project/mastodon-for-ios)
+
+
 <a href="https://apps.apple.com/us/app/mastodon-for-iphone/id1571998974?itsct=apps_box_badge&amp;itscg=30200" style="display: inline-block; overflow: hidden; border-top-left-radius: 13px; border-top-right-radius: 13px; border-bottom-right-radius: 13px; border-bottom-left-radius: 13px; width: 250px; height: 83px;"><img src="https://tools.applemediaservices.com/api/badges/download-on-the-app-store/black/en-us?size=250x83&amp;releaseDate=1627603200&h=72b0c8495c2c0af1291efef280c4c2c1" alt="Download on the App Store" style="border-top-left-radius: 13px; border-top-right-radius: 13px; border-bottom-right-radius: 13px; border-bottom-left-radius: 13px; width: 250px; height: 83px;"></a>
 
 ## Requirements