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diff --git a/vendor/icu_locid/src/subtags/language.rs b/vendor/icu_locid/src/subtags/language.rs
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+++ b/vendor/icu_locid/src/subtags/language.rs
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+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+impl_tinystr_subtag!(
+    /// A language subtag (examples: `"en"`, `"csb"`, `"zh"`, `"und"`, etc.)
+    ///
+    /// [`Language`] represents a Unicode base language code conformat to the
+    /// [`unicode_language_id`] field of the Language and Locale Identifier.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use icu::locid::subtags::Language;
+    ///
+    /// let language: Language =
+    ///     "en".parse().expect("Failed to parse a language subtag.");
+    /// ```
+    ///
+    /// If the [`Language`] has no value assigned, it serializes to a string `"und"`, which
+    /// can be then parsed back to an empty [`Language`] field.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use icu::locid::subtags::Language;
+    ///
+    /// assert_eq!(Language::default().as_str(), "und");
+    /// ```
+    ///
+    /// `Notice`: ICU4X uses a narrow form of language subtag of 2-3 characters.
+    /// The specification allows language subtag to optionally also be 5-8 characters
+    /// but that form has not been used and ICU4X does not support it right now.
+    ///
+    /// [`unicode_language_id`]: https://unicode.org/reports/tr35/#unicode_language_id
+    Language,
+    subtags::Language,
+    subtags_language,
+    2..=3,
+    s,
+    s.is_ascii_alphabetic(),
+    s.to_ascii_lowercase(),
+    s.is_ascii_alphabetic_lowercase(),
+    InvalidLanguage,
+    ["en", "foo"],
+    ["419", "german", "en1"],
+);
+
+impl Language {
+    /// The default undefined language "und". Same as [`default()`](Default::default()).
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use icu::locid::subtags::Language;
+    ///
+    /// assert_eq!(Language::default(), Language::UND);
+    /// assert_eq!("und", Language::UND.to_string());
+    /// ```
+    pub const UND: Self = unsafe { Self::from_raw_unchecked(*b"und") };
+
+    /// Resets the [`Language`] subtag to an empty one (equal to `"und"`).
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use icu::locid::subtags::Language;
+    ///
+    /// let mut lang: Language = "csb".parse().expect("Parsing failed.");
+    ///
+    /// assert_eq!(lang.as_str(), "csb");
+    ///
+    /// lang.clear();
+    ///
+    /// assert_eq!(lang.as_str(), "und");
+    /// ```
+    #[inline]
+    pub fn clear(&mut self) {
+        *self = Self::UND
+    }
+
+    /// Tests if the [`Language`] subtag is empty (equal to `"und"`).
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use icu::locid::subtags::Language;
+    ///
+    /// let mut lang: Language = "und".parse().expect("Parsing failed.");
+    ///
+    /// assert!(lang.is_empty());
+    ///
+    /// lang.clear();
+    ///
+    /// assert!(lang.is_empty());
+    /// ```
+    #[inline]
+    pub fn is_empty(self) -> bool {
+        self == Self::UND
+    }
+}
+
+impl Default for Language {
+    fn default() -> Language {
+        Language::UND
+    }
+}