diff --git a/README.md b/README.md
index 0a07699..8b88992 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ important fields are:
 - `app_store_id` - this should to be taken from the developer.apple.com, where the application release is prepared. Note you can use the app_store_id even if the app is not yet released. The id is used within the app in the "Rate the app" section, so users can be redirected to a specific app in the App Store, to rate it.
 - `build_version` - it should be a single digit number, used as the last part of the final app version.
 [MAJOR].[MINOR].**[PATCH]**. The final version of the app contains the date of the ZIM file provided (using the year and month) and the build_version as the last part. The format of the version comes from the [Apple docs](https://developer.apple.com/documentation/bundleresources/information_property_list/cfbundleshortversionstring). Eg., given a ZIM file: "dictionary_nopic_2023-12-15.zim", and "build_version": "5" we combine it the following way: take the year 2023 and the month 12 from the ZIM file, and combine it with the build_version, resulting in: "2023.12.5". [More on this process here](https://github.com/kiwix/apple/issues/559).
-- `enforced_lang` - (lang code eg: en, de, he) if it is set, it will include only this language in the final app, meaning no other languages can be selected (on iOS) for the application UI. See the current list of supported languages [already translated in the main repo](https://github.com/kiwix/apple/tree/main/Support). When using this option, make sure that [the translation coverage](https://translatewiki.net/wiki/Special:MessageGroupStats/kiwix-apple?group=kiwix-apple&messages=&suppressempty=1&x=D) is 100% for the enforced language.
+- `enforced_lang` - ISO 639-1 language code (eg: en, de, he) if it is set, it will include only this language in the final app, meaning no other languages can be selected (on iOS) for the application UI. See the current list of supported languages [already translated in the main repo](https://github.com/kiwix/apple/tree/main/Support). When using this option, make sure that [the translation coverage](https://translatewiki.net/wiki/Special:MessageGroupStats/kiwix-apple?group=kiwix-apple&messages=&suppressempty=1&x=D) is 100% for the enforced language.
  
     If enforced_lang is not added to the info.json file, all languages will be supported by the app, just like in Kiwix.