diff --git a/.github/workflows/README.md b/.github/workflows/README.md
index 0c0420c4435..384a093bf36 100644
--- a/.github/workflows/README.md
+++ b/.github/workflows/README.md
@@ -64,8 +64,14 @@ itself:
 
 ....
 
-# crowdin.yml
-TODO
+# crowdin.yml: Upload translation sources to [Crowdin](translate.keyman.com)
+
+This action automatically updates the English source strings on Crowdin
+https://crowdin.com/project/keyman/sources/files
+
+based on the root [crowdin.yml](../../crowdin.yml) configuration file. The daily cron job currently runs at 6:00AM.
+
+This should match the behavior of locally using the [Crowdin CLI to upload sources](https://crowdin.github.io/crowdin-cli/commands/crowdin-upload-sources).
 
 # deb-packaging.yml: Ubuntu Packaging GitHub Action
 
diff --git a/crowdin.yml b/crowdin.yml
index 812cfa21c77..44861c3ac54 100644
--- a/crowdin.yml
+++ b/crowdin.yml
@@ -34,10 +34,10 @@ files:
     languages_mapping:
       # Prevent invalid region pap-rPAP. Leaving "in" for Indonesian
       android_code:
-        el-polyton: b+el # TODO: figure out polyton variant
+        #el-polyton: b+el # TODO: figure out polyton variant
         es-419: b+es+419
         pap: pap
-        shu-latn-n: b+shu+latn
+        #shu-latn-n: b+shu+latn
 
   - source: /android/KMAPro/kMAPro/src/main/res/values/strings.xml
     dest: /android/app/strings.xml
@@ -45,10 +45,10 @@ files:
     languages_mapping:
       # Prevent invalid region pap-rPAP
       android_code:
-        el-polyton: b+el # TODO: figure out polyton variant
+        #el-polyton: b+el # TODO: figure out polyton variant
         es-419: b+es+419
         pap: pap
-        shu-latn-n: b+shu+latn
+        #shu-latn-n: b+shu+latn
 
   # Windows files
   # Note: we use type: android for the Windows project files
@@ -81,7 +81,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /ios/engine/KMEI/KeymanEngine/en.lproj/Localizable.strings
     dest: /ios/engine/Localizable.strings
@@ -89,7 +89,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /ios/engine/KMEI/KeymanEngine/en.lproj/Localizable.stringsdict
     dest: /ios/engine/Localizable.stringsdict
@@ -97,7 +97,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /ios/keyman/Keyman/Keyman/en.lproj/Localizable.strings
     dest: /ios/app/Localizable.strings
@@ -105,7 +105,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   # Linux files
 
@@ -116,7 +116,7 @@ files:
     update_option: update_as_unapproved
     languages_mapping:
       locale_with_underscore:
-        shu-latn-n: shu@latin
+        #shu-latn-n: shu@latin
         ha: ha
 
   # macOS files
@@ -127,7 +127,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /mac/Keyman4MacIM/Keyman4MacIM/KMConfiguration/en.lproj/preferences.strings
     dest: /mac/app/preferences.strings
@@ -135,7 +135,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /mac/Keyman4MacIM/Keyman4MacIM/KMInfoWindow/en.lproj/KMInfoWindowController.strings
     dest: /mac/app/KMInfoWindowController.strings
@@ -143,7 +143,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /mac/Keyman4MacIM/Keyman4MacIM/KMKeyboardHelpWindow/en.lproj/KMKeyboardHelpWindowController.strings
     dest: /mac/app/KMKeyboardHelpWindowController.strings
@@ -151,7 +151,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /mac/Keyman4MacIM/Keyman4MacIM/en.lproj/Localizable.strings
     dest: /mac/app/Localizable.strings
@@ -159,7 +159,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   - source: /mac/Keyman4MacIM/Keyman4MacIM/en.lproj/MainMenu.strings
     dest: /mac/app/MainMenu.strings
@@ -167,7 +167,7 @@ files:
     languages_mapping:
       osx_code:
         pt-PT: pt-PT.lproj
-        el-polyton: el.lproj
+        #el-polyton: el.lproj
 
   # crowdin parameters descriptions: