From ba25f7eedaca9bb93bb396a102b4778a139ad451 Mon Sep 17 00:00:00 2001
From: Burak Guner <burak.guner@callstack.com>
Date: Thu, 30 Jul 2026 18:08:33 +0300
Subject: [PATCH] respect unicode extensions

---
 README.md                                        |  7 ++++---
 .../zoontek/rnlocalize/RNLocalizeModuleImpl.kt   |  1 +
 ios/RNLocalize.mm                                |  1 +
 src/extras/mock/index.ts                         | 16 ++++++++++++++--
 src/module.ts                                    |  1 +
 src/types.ts                                     |  2 ++
 6 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 26ec2b7..48683c5 100644
--- a/README.md
+++ b/README.md
@@ -204,6 +204,7 @@ type getLocales = () => Array<{
   scriptCode?: string;
   countryCode: string;
   languageTag: string;
+  languageTagWithExtensions: string;
   isRTL: boolean;
 }>;
 ```
@@ -215,9 +216,9 @@ import { getLocales } from "react-native-localize";
 
 console.log(getLocales());
 /* -> [
-  { countryCode: "GB", languageTag: "en-GB", languageCode: "en", isRTL: false },
-  { countryCode: "US", languageTag: "en-US", languageCode: "en", isRTL: false },
-  { countryCode: "FR", languageTag: "fr-FR", languageCode: "fr", isRTL: false },
+  { countryCode: "GB", languageTag: "en-GB", languageTagWithExtensions: "en-GB", languageCode: "en", isRTL: false },
+  { countryCode: "US", languageTag: "en-US", languageTagWithExtensions: "en-US", languageCode: "en", isRTL: false },
+  { countryCode: "SA", languageTag: "ar-SA", languageTagWithExtensions: "ar-SA-u-nu-latn", languageCode: "ar", isRTL: true },
 ] */
 ```
 
diff --git a/android/src/main/java/com/zoontek/rnlocalize/RNLocalizeModuleImpl.kt b/android/src/main/java/com/zoontek/rnlocalize/RNLocalizeModuleImpl.kt
index 1c25661..72b6093 100644
--- a/android/src/main/java/com/zoontek/rnlocalize/RNLocalizeModuleImpl.kt
+++ b/android/src/main/java/com/zoontek/rnlocalize/RNLocalizeModuleImpl.kt
@@ -163,6 +163,7 @@ object RNLocalizeModuleImpl {
         putString("languageCode", languageCode)
         putString("countryCode", countryCode)
         putString("languageTag", languageTag)
+        putString("languageTagWithExtensions", systemLocale.toLanguageTag())
 
         val rtl = TextUtils.getLayoutDirectionFromLocale(systemLocale) == View.LAYOUT_DIRECTION_RTL
         putBoolean("isRTL", rtl)
diff --git a/ios/RNLocalize.mm b/ios/RNLocalize.mm
index 7d0a44e..f1acb8f 100755
--- a/ios/RNLocalize.mm
+++ b/ios/RNLocalize.mm
@@ -123,6 +123,7 @@ - (NSArray *)getLocalesImpl {
       @"languageCode": languageCode,
       @"countryCode": countryCode,
       @"languageTag": languageTag,
+      @"languageTagWithExtensions": identifier,
       @"isRTL": @(isRTL),
     }];
 
diff --git a/src/extras/mock/index.ts b/src/extras/mock/index.ts
index 1274d92..cfd82e4 100644
--- a/src/extras/mock/index.ts
+++ b/src/extras/mock/index.ts
@@ -6,8 +6,20 @@ export const getCurrencies = () => ["USD", "EUR"]; // can be empty array
 
 export const getLocales = () => [
   // extend if needed, add the locales you want
-  { countryCode: "US", languageTag: "en-US", languageCode: "en", isRTL: false },
-  { countryCode: "FR", languageTag: "fr-FR", languageCode: "fr", isRTL: false },
+  {
+    countryCode: "US",
+    languageTag: "en-US",
+    languageTagWithExtensions: "en-US",
+    languageCode: "en",
+    isRTL: false,
+  },
+  {
+    countryCode: "FR",
+    languageTag: "fr-FR",
+    languageTagWithExtensions: "fr-FR",
+    languageCode: "fr",
+    isRTL: false,
+  },
 ];
 
 export const getNumberFormatSettings = () => ({
diff --git a/src/module.ts b/src/module.ts
index 6328c3c..b0260fc 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -42,6 +42,7 @@ const convertLanguageTagToLocale = (
     languageCode,
     countryCode,
     languageTag: `${languageCode}-${countryCode}`,
+    languageTagWithExtensions: languageTag,
     isRTL: USES_RTL_LAYOUT.has(languageCode),
   };
 };
diff --git a/src/types.ts b/src/types.ts
index 32e67d5..17d224e 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -30,6 +30,8 @@ export type Locale = Readonly<{
   countryCode: string;
   /** Full BCP 47 language tag (e.g., `"en-US"`, `"zh-Hans-CN"`) */
   languageTag: string;
+  /** Full BCP 47 language tag, including Unicode extensions when available (e.g., `"ar-SA-u-nu-latn"`) */
+  languageTagWithExtensions: string;
   /** Whether the locale uses right-to-left text direction */
   isRTL: boolean;
 }>;