diff --git a/core-foundation-sys/src/lib.rs b/core-foundation-sys/src/lib.rs
index 2ff6d31..2ff4ed7 100644
--- a/core-foundation-sys/src/lib.rs
+++ b/core-foundation-sys/src/lib.rs
@@ -30,6 +30,7 @@ pub mod date;
 pub mod dictionary;
 pub mod error;
 pub mod filedescriptor;
+pub mod locale;
 pub mod messageport;
 pub mod number;
 pub mod propertylist;
diff --git a/core-foundation-sys/src/locale.rs b/core-foundation-sys/src/locale.rs
new file mode 100644
index 0000000..b394714
--- /dev/null
+++ b/core-foundation-sys/src/locale.rs
@@ -0,0 +1,115 @@
+// Copyright 2023 The Servo Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::os::raw::c_void;
+use base::{CFIndex, CFAllocatorRef, CFTypeRef, LangCode, RegionCode, CFTypeID};
+use array::CFArrayRef;
+use string::CFStringRef;
+use dictionary::CFDictionaryRef;
+
+#[repr(C)]
+pub struct __CFLocale(c_void);
+pub type CFLocaleRef = *const __CFLocale;
+
+pub type CFLocaleIdentifier = CFStringRef;
+pub type CFLocaleKey = CFStringRef;
+pub type CFCalendarIdentifier = CFStringRef;
+pub type CFLocaleLanguageDirection = CFIndex;
+
+pub const kCFLocaleLanguageDirectionUnknown: CFLocaleLanguageDirection = 0;
+pub const kCFLocaleLanguageDirectionLeftToRight: CFLocaleLanguageDirection = 1;
+pub const kCFLocaleLanguageDirectionRightToLeft: CFLocaleLanguageDirection = 2;
+pub const kCFLocaleLanguageDirectionTopToBottom: CFLocaleLanguageDirection = 3;
+pub const kCFLocaleLanguageDirectionBottomToTop: CFLocaleLanguageDirection = 4;
+
+extern {
+    /*
+     * CFLocale.h
+     */
+
+    /* Locale Change Notification */
+    //pub static kCFLocaleCurrentLocaleDidChangeNotification: CFNotificationName;
+
+    /* Locale Property Keys */
+    pub static kCFLocaleIdentifier: CFLocaleKey;
+    pub static kCFLocaleLanguageCode: CFLocaleKey;
+    pub static kCFLocaleCountryCode: CFLocaleKey;
+    pub static kCFLocaleScriptCode: CFLocaleKey;
+    pub static kCFLocaleVariantCode: CFLocaleKey;
+
+    pub static kCFLocaleExemplarCharacterSet: CFLocaleKey;
+    pub static kCFLocaleCalendarIdentifier: CFLocaleKey;
+    pub static kCFLocaleCalendar: CFLocaleKey;
+    pub static kCFLocaleCollationIdentifier: CFLocaleKey;
+    pub static kCFLocaleUsesMetricSystem: CFLocaleKey;
+    pub static kCFLocaleMeasurementSystem: CFLocaleKey;
+    pub static kCFLocaleDecimalSeparator: CFLocaleKey;
+    pub static kCFLocaleGroupingSeparator: CFLocaleKey;
+    pub static kCFLocaleCurrencySymbol: CFLocaleKey;
+    pub static kCFLocaleCurrencyCode: CFLocaleKey;
+    pub static kCFLocaleCollatorIdentifier: CFLocaleKey;
+    pub static kCFLocaleQuotationBeginDelimiterKey: CFLocaleKey;
+    pub static kCFLocaleQuotationEndDelimiterKey: CFLocaleKey;
+    pub static kCFLocaleAlternateQuotationBeginDelimiterKey: CFLocaleKey;
+    pub static kCFLocaleAlternateQuotationEndDelimiterKey: CFLocaleKey;
+
+    /* Locale Calendar Identifiers */
+    pub static kCFGregorianCalendar: CFCalendarIdentifier;
+    pub static kCFBuddhistCalendar: CFCalendarIdentifier;
+    pub static kCFChineseCalendar: CFCalendarIdentifier;
+    pub static kCFHebrewCalendar: CFCalendarIdentifier;
+    pub static kCFIslamicCalendar: CFCalendarIdentifier;
+    pub static kCFIslamicCivilCalendar: CFCalendarIdentifier;
+    pub static kCFJapaneseCalendar: CFCalendarIdentifier;
+    pub static kCFRepublicOfChinaCalendar: CFCalendarIdentifier;
+    pub static kCFPersianCalendar: CFCalendarIdentifier;
+    pub static kCFIndianCalendar: CFCalendarIdentifier;
+    pub static kCFISO8601Calendar: CFCalendarIdentifier;
+    //pub static kCFIslamicTabularCalendar: CFCalendarIdentifier; // macos(10.10)+
+    //pub static kCFIslamicUmmAlQuraCalendar: CFCalendarIdentifier; // macos(10.10)+
+
+    /* Creating a Locale */
+    pub fn CFLocaleCopyCurrent() -> CFLocaleRef;
+    pub fn CFLocaleCreate(allocator: CFAllocatorRef, localeIdentifier: CFLocaleIdentifier) -> CFLocaleRef;
+    pub fn CFLocaleCreateCopy(allocator: CFAllocatorRef, locale: CFLocaleRef) -> CFLocaleRef;
+    pub fn CFLocaleGetSystem() -> CFLocaleRef;
+
+    /* Getting System Locale Information */
+    pub fn CFLocaleCopyAvailableLocaleIdentifiers() -> CFArrayRef;
+
+    /* Getting ISO Information */
+    pub fn CFLocaleCopyISOCountryCodes() -> CFArrayRef;
+    pub fn CFLocaleCopyISOLanguageCodes() -> CFArrayRef;
+    pub fn CFLocaleCopyISOCurrencyCodes() -> CFArrayRef;
+    pub fn CFLocaleCopyCommonISOCurrencyCodes() -> CFArrayRef;
+
+    /* Language Preferences */
+    pub fn CFLocaleCopyPreferredLanguages() -> CFArrayRef;
+
+    /* Getting Information About a Locale */
+    pub fn CFLocaleCopyDisplayNameForPropertyValue(displayLocale: CFLocaleRef, key: CFLocaleKey, value: CFStringRef) -> CFStringRef;
+    pub fn CFLocaleGetValue(locale: CFLocaleRef, key: CFLocaleKey) -> CFTypeRef;
+    pub fn CFLocaleGetIdentifier(locale: CFLocaleRef) -> CFLocaleIdentifier;
+
+    /* Getting and Creating Locale Identifiers */
+    pub fn CFLocaleCreateCanonicalLocaleIdentifierFromScriptManagerCodes(allocator: CFAllocatorRef, lcode: LangCode, rcode: RegionCode) -> CFLocaleIdentifier;
+    pub fn CFLocaleCreateCanonicalLanguageIdentifierFromString(allocator: CFAllocatorRef, localeIdentifier: CFStringRef) -> CFLocaleIdentifier;
+    pub fn CFLocaleCreateCanonicalLocaleIdentifierFromString(allocator: CFAllocatorRef, localeIdentifier: CFStringRef) -> CFLocaleIdentifier;
+    pub fn CFLocaleCreateComponentsFromLocaleIdentifier(allocator: CFAllocatorRef, localeID: CFLocaleIdentifier) -> CFDictionaryRef;
+    pub fn CFLocaleCreateLocaleIdentifierFromComponents(allocator: CFAllocatorRef, dictionary: CFDictionaryRef) -> CFLocaleIdentifier;
+    pub fn CFLocaleCreateLocaleIdentifierFromWindowsLocaleCode(allocator: CFAllocatorRef, lcid: u32) -> CFLocaleIdentifier;
+    pub fn CFLocaleGetWindowsLocaleCodeFromLocaleIdentifier(localeIdentifier: CFLocaleIdentifier) -> u32;
+
+    /* Getting Line and Character Direction for a Language */
+    pub fn CFLocaleGetLanguageCharacterDirection(isoLangCode: CFStringRef) -> CFLocaleLanguageDirection;
+    pub fn CFLocaleGetLanguageLineDirection(isoLangCode: CFStringRef) -> CFLocaleLanguageDirection;
+
+    /* Getting the CFLocale Type ID */
+    pub fn CFLocaleGetTypeID() -> CFTypeID;
+}