Added helper method to get iOS device language

com.adsbynimbus.nimbus/Runtime/Plugins/iOS/NimbusBinding.mm

@@ -56,6 +56,10 @@ int _getConnectionType() {
     const char* _getDeviceModel() {
         return strdup([[NimbusHelper getDeviceModel] UTF8String]);
     }
+
+    const char* _getDeviceLanguage() {
+        return strdup([[NimbusHelper getDeviceLanguage] UTF8String]);
+    }
 
     const char* _getSystemVersion() {
         return strdup([[NimbusHelper getSystemVersion] UTF8String]);

com.adsbynimbus.nimbus/Runtime/Plugins/iOS/NimbusHelper.swift

@@ -32,6 +32,17 @@ import AppTrackingTransparency
         UIDevice.current.nimbusModelName
     }
 
+    @objc public class func getDeviceLanguage() -> String? {
+        guard let preferred = Locale.preferredLanguages.first else {
+            // Edge case fallback as I saw some old ObjC case where preferredLanguages
+            // returned an empty array (causing a crash) and Apple Docs don't say this array must not
+            // be empty despite not being able to delete all preferred languages on an iOS device.
+            return Locale.current.languageCode
+        }
+
+        return Locale(identifier: preferred).languageCode
+    }
+
     @objc public class func getSystemVersion() -> String {
         UIDevice.current.systemVersion
     }

com.adsbynimbus.nimbus/Runtime/Scripts/Nimbus.Internal/IOS.cs

@@ -51,6 +51,9 @@ private static extern void _renderAd(int adUnitInstanceId, string bidResponse, b
 
 		[DllImport("__Internal")]
 		private static extern string _getDeviceModel();
+
+		[DllImport("__Internal")]
+		private static extern string _getDeviceLanguage();
 
 		[DllImport("__Internal")]
 		private static extern string _getSystemVersion();
@@ -137,6 +140,7 @@ internal override Device GetDevice() {
 				Make = "apple",
 				Model = _getDeviceModel(),
 				Osv = _getSystemVersion(),
+				Language = _getDeviceLanguage(),
 				Ext = new DeviceExt {
 					Ifv = _getVendorId()
 				},