1 files changed, 31 insertions, 0 deletions
diff --git a/platform/ios/src/NSOrthography+MGLAdditions.m b/platform/ios/src/NSOrthography+MGLAdditions.m
new file mode 100644
index 0000000000..99258862cc
--- /dev/null
+++ b/platform/ios/src/NSOrthography+MGLAdditions.m
@@ -0,0 +1,31 @@
+#import "NSOrthography+MGLAdditions.h"
+
+@implementation NSOrthography (MGLAdditions)
+
++ (NSString *)mgl_dominantScriptForMapboxStreetsLanguage:(NSString *)language {
+    if (@available(iOS 11.0, *)) {
+        NSLocale *locale = [NSLocale localeWithLocaleIdentifier:language];
+        NSOrthography *orthography = [NSOrthography defaultOrthographyForLanguage:locale.localeIdentifier];
+
+        return orthography.dominantScript;
+    }
+
+    // Manually map Mapbox Streets languages to ISO 15924 script codes.
+    NSSet *latinLanguages = [NSSet setWithObjects:@"de", @"en", @"es", @"fr", @"pt", nil];
+    NSSet *hansLanguages = [NSSet setWithObjects:@"zh", @"zh-Hans", nil];
+
+    if ([latinLanguages containsObject:language]) {
+        return @"Latn";
+    } else if ([hansLanguages containsObject:language]) {
+        return @"Hans";
+    } else if ([language isEqualToString:@"ru"]) {
+        return @"Cyrl";
+    } else if ([language isEqualToString:@"ar"]) {
+        return @"Arab";
+    } else {
+        // Code for undetermined script
+        return @"Zyyy";
+    }
+}
+
+@end