diff --git a/doc/functions/country_names.rst b/doc/functions/country_names.rst
new file mode 100644
index 000000000..692137b04
--- /dev/null
+++ b/doc/functions/country_names.rst
@@ -0,0 +1,47 @@
+``country_names``
+=================
+
+.. versionadded:: 3.5
+
+    The ``country_names`` function was added in Twig 3.5.
+
+The ``country_names`` function returns the names of the countries:
+
+.. code-block:: twig
+
+    {# Afghanistan, Åland Islands, ... #}
+    {{ country_names()|join(', ') }}
+    
+By default, the function uses the current locale. You can pass it explicitly:
+
+.. code-block:: twig
+
+    {# Afghanistan, Afrique du Sud, ... #}
+    {{ country_names('fr')|join(', ') }}
+
+.. note::
+
+    The ``country_names`` function is part of the ``IntlExtension`` which is not
+    installed by default. Install it first:
+
+    .. code-block:: bash
+
+        $ composer require twig/intl-extra
+
+    Then, on Symfony projects, install the ``twig/extra-bundle``:
+
+    .. code-block:: bash
+
+        $ composer require twig/extra-bundle
+
+    Otherwise, add the extension explicitly on the Twig environment::
+
+        use Twig\Extra\Intl\IntlExtension;
+
+        $twig = new \Twig\Environment(...);
+        $twig->addExtension(new IntlExtension());
+
+Arguments
+---------
+
+* ``locale``: The locale
diff --git a/doc/functions/currency_names.rst b/doc/functions/currency_names.rst
new file mode 100644
index 000000000..dfb446c86
--- /dev/null
+++ b/doc/functions/currency_names.rst
@@ -0,0 +1,47 @@
+``currency_names``
+==================
+
+.. versionadded:: 3.5
+
+    The ``currency_names`` function was added in Twig 3.5.
+
+The ``currency_names`` function returns the names of the currencies:
+
+.. code-block:: twig
+
+    {# Afghan Afghani, Afghan Afghani (1927–2002), ... #}
+    {{ currency_names()|join(', ') }}
+    
+By default, the function uses the current locale. You can pass it explicitly:
+
+.. code-block:: twig
+
+    {# afghani (1927–2002), afghani afghan, ... #}
+    {{ currency_names('fr')|join(', ') }}
+
+.. note::
+
+    The ``currency_names`` function is part of the ``IntlExtension`` which is not
+    installed by default. Install it first:
+
+    .. code-block:: bash
+
+        $ composer require twig/intl-extra
+
+    Then, on Symfony projects, install the ``twig/extra-bundle``:
+
+    .. code-block:: bash
+
+        $ composer require twig/extra-bundle
+
+    Otherwise, add the extension explicitly on the Twig environment::
+
+        use Twig\Extra\Intl\IntlExtension;
+
+        $twig = new \Twig\Environment(...);
+        $twig->addExtension(new IntlExtension());
+
+Arguments
+---------
+
+* ``locale``: The locale
diff --git a/doc/functions/language_names.rst b/doc/functions/language_names.rst
new file mode 100644
index 000000000..f1cce488a
--- /dev/null
+++ b/doc/functions/language_names.rst
@@ -0,0 +1,47 @@
+``language_names``
+==================
+
+.. versionadded:: 3.5
+
+    The ``language_names`` function was added in Twig 3.5.
+
+The ``language_names`` function returns the names of the languages:
+
+.. code-block:: twig
+
+    {# Abkhazian, Achinese, ... #}
+    {{ language_names()|join(', ') }}
+    
+By default, the function uses the current locale. You can pass it explicitly:
+
+.. code-block:: twig
+
+    {# abkhaze, aceh, ... #}
+    {{ language_names('fr')|join(', ') }}
+
+.. note::
+
+    The ``language_names`` function is part of the ``IntlExtension`` which is not
+    installed by default. Install it first:
+
+    .. code-block:: bash
+
+        $ composer require twig/intl-extra
+
+    Then, on Symfony projects, install the ``twig/extra-bundle``:
+
+    .. code-block:: bash
+
+        $ composer require twig/extra-bundle
+
+    Otherwise, add the extension explicitly on the Twig environment::
+
+        use Twig\Extra\Intl\IntlExtension;
+
+        $twig = new \Twig\Environment(...);
+        $twig->addExtension(new IntlExtension());
+
+Arguments
+---------
+
+* ``locale``: The locale
diff --git a/doc/functions/locale_names.rst b/doc/functions/locale_names.rst
new file mode 100644
index 000000000..320ab6724
--- /dev/null
+++ b/doc/functions/locale_names.rst
@@ -0,0 +1,47 @@
+``locale_names``
+================
+
+.. versionadded:: 3.5
+
+    The ``locale_names`` function was added in Twig 3.5.
+
+The ``locale_names`` function returns the names of the locales:
+
+.. code-block:: twig
+
+    {# Afrikaans, Afrikaans (Namibia), ... #}
+    {{ locale_names()|join(', ') }}
+    
+By default, the function uses the current locale. You can pass it explicitly:
+
+.. code-block:: twig
+
+    {# afrikaans, afrikaans (Afrique du Sud), ... #}
+    {{ locale_names('fr')|join(', ') }}
+
+.. note::
+
+    The ``locale_names`` function is part of the ``IntlExtension`` which is not
+    installed by default. Install it first:
+
+    .. code-block:: bash
+
+        $ composer require twig/intl-extra
+
+    Then, on Symfony projects, install the ``twig/extra-bundle``:
+
+    .. code-block:: bash
+
+        $ composer require twig/extra-bundle
+
+    Otherwise, add the extension explicitly on the Twig environment::
+
+        use Twig\Extra\Intl\IntlExtension;
+
+        $twig = new \Twig\Environment(...);
+        $twig->addExtension(new IntlExtension());
+
+Arguments
+---------
+
+* ``locale``: The locale
diff --git a/doc/functions/script_names.rst b/doc/functions/script_names.rst
new file mode 100644
index 000000000..79b20c65f
--- /dev/null
+++ b/doc/functions/script_names.rst
@@ -0,0 +1,47 @@
+``script_names``
+================
+
+.. versionadded:: 3.5
+
+    The ``script_names`` function was added in Twig 3.5.
+
+The ``script_names`` function returns the names of the scripts:
+
+.. code-block:: twig
+
+    {# Adlam, Afaka, ... #}
+    {{ script_names()|join(', ') }}
+    
+By default, the function uses the current locale. You can pass it explicitly:
+
+.. code-block:: twig
+
+    {# Adlam, Afaka, ... #}
+    {{ script_names('fr')|join(', ') }}
+
+.. note::
+
+    The ``script_names`` function is part of the ``IntlExtension`` which is not
+    installed by default. Install it first:
+
+    .. code-block:: bash
+
+        $ composer require twig/intl-extra
+
+    Then, on Symfony projects, install the ``twig/extra-bundle``:
+
+    .. code-block:: bash
+
+        $ composer require twig/extra-bundle
+
+    Otherwise, add the extension explicitly on the Twig environment::
+
+        use Twig\Extra\Intl\IntlExtension;
+
+        $twig = new \Twig\Environment(...);
+        $twig->addExtension(new IntlExtension());
+
+Arguments
+---------
+
+* ``locale``: The locale
diff --git a/doc/functions/timezone_names.rst b/doc/functions/timezone_names.rst
new file mode 100644
index 000000000..69db196fd
--- /dev/null
+++ b/doc/functions/timezone_names.rst
@@ -0,0 +1,47 @@
+``timezone_names``
+==================
+
+.. versionadded:: 3.5
+
+    The ``timezone_names`` function was added in Twig 3.5.
+
+The ``timezone_names`` function returns the names of the timezones:
+
+.. code-block:: twig
+
+    {# Acre Time (Eirunepe), Acre Time (Rio Branco), ... #}
+    {{ timezone_names()|join(', ') }}
+    
+By default, the function uses the current locale. You can pass it explicitly:
+
+.. code-block:: twig
+
+    {# heure : Antarctique (Casey), heure : Canada (Montreal), ... #}
+    {{ timezone_names('fr')|join(', ') }}
+
+.. note::
+
+    The ``timezone_names`` function is part of the ``IntlExtension`` which is not
+    installed by default. Install it first:
+
+    .. code-block:: bash
+
+        $ composer require twig/intl-extra
+
+    Then, on Symfony projects, install the ``twig/extra-bundle``:
+
+    .. code-block:: bash
+
+        $ composer require twig/extra-bundle
+
+    Otherwise, add the extension explicitly on the Twig environment::
+
+        use Twig\Extra\Intl\IntlExtension;
+
+        $twig = new \Twig\Environment(...);
+        $twig->addExtension(new IntlExtension());
+
+Arguments
+---------
+
+* ``locale``: The locale
diff --git a/extra/intl-extra/IntlExtension.php b/extra/intl-extra/IntlExtension.php
index 1fce0c788..76c2b271e 100644
--- a/extra/intl-extra/IntlExtension.php
+++ b/extra/intl-extra/IntlExtension.php
@@ -16,6 +16,7 @@
 use Symfony\Component\Intl\Exception\MissingResourceException;
 use Symfony\Component\Intl\Languages;
 use Symfony\Component\Intl\Locales;
+use Symfony\Component\Intl\Scripts;
 use Symfony\Component\Intl\Timezones;
 use Twig\Environment;
 use Twig\Error\RuntimeError;
@@ -152,6 +153,12 @@ public function getFunctions()
         return [
             // internationalized names
             new TwigFunction('country_timezones', [$this, 'getCountryTimezones']),
+            new TwigFunction('language_names', [$this, 'getLanguageNames']),
+            new TwigFunction('script_names', [$this, 'getScriptNames']),
+            new TwigFunction('country_names', [$this, 'getCountryNames']),
+            new TwigFunction('locale_names', [$this, 'getLocaleNames']),
+            new TwigFunction('currency_names', [$this, 'getCurrencyNames']),
+            new TwigFunction('timezone_names', [$this, 'getTimezoneNames']),
         ];
     }
 
@@ -242,6 +249,60 @@ public function getCountryTimezones(string $country): array
         }
     }
 
+    public function getLanguageNames(string $locale = null): array
+    {
+        try {
+            return Languages::getNames($locale);
+        } catch (MissingResourceException $exception) {
+            return [];
+        }
+    }
+
+    public function getScriptNames(string $locale = null): array
+    {
+        try {
+            return Scripts::getNames($locale);
+        } catch (MissingResourceException $exception) {
+            return [];
+        }
+    }
+
+    public function getCountryNames(string $locale = null): array
+    {
+        try {
+            return Countries::getNames($locale);
+        } catch (MissingResourceException $exception) {
+            return [];
+        }
+    }
+
+    public function getLocaleNames(string $locale = null): array
+    {
+        try {
+            return Locales::getNames($locale);
+        } catch (MissingResourceException $exception) {
+            return [];
+        }
+    }
+
+    public function getCurrencyNames(string $locale = null): array
+    {
+        try {
+            return Currencies::getNames($locale);
+        } catch (MissingResourceException $exception) {
+            return [];
+        }
+    }
+
+    public function getTimezoneNames(string $locale = null): array
+    {
+        try {
+            return Timezones::getNames($locale);
+        } catch (MissingResourceException $exception) {
+            return [];
+        }
+    }
+
     public function formatCurrency($amount, string $currency, array $attrs = [], string $locale = null): string
     {
         $formatter = $this->createNumberFormatter($locale, 'currency', $attrs);
@@ -279,7 +340,7 @@ public function formatNumberStyle(string $style, $number, array $attrs = [], str
      */
     public function formatDateTime(Environment $env, $date, ?string $dateFormat = 'medium', ?string $timeFormat = 'medium', string $pattern = '', $timezone = null, string $calendar = 'gregorian', string $locale = null): string
     {
-        $date = \twig_date_converter($env, $date, $timezone);
+        $date = twig_date_converter($env, $date, $timezone);
         $formatter = $this->createDateFormatter($locale, $dateFormat, $timeFormat, $pattern, $date->getTimezone(), $calendar);
 
         if (false === $ret = $formatter->format($date)) {
diff --git a/extra/intl-extra/Tests/Fixtures/country_names.test b/extra/intl-extra/Tests/Fixtures/country_names.test
new file mode 100644
index 000000000..f3cb07974
--- /dev/null
+++ b/extra/intl-extra/Tests/Fixtures/country_names.test
@@ -0,0 +1,16 @@
+--TEST--
+"country_names" function
+--TEMPLATE--
+{{ country_names('UNKNOWN')|length }}
+{{ country_names()|length }}
+{{ country_names('fr')|length }}
+{{ country_names()['BE'] }}
+{{ country_names('fr')['BE'] }}
+--DATA--
+return [];
+--EXPECT--
+0
+249
+249
+Belgium
+Belgique
diff --git a/extra/intl-extra/Tests/Fixtures/currency_names.test b/extra/intl-extra/Tests/Fixtures/currency_names.test
new file mode 100644
index 000000000..bc2c54d02
--- /dev/null
+++ b/extra/intl-extra/Tests/Fixtures/currency_names.test
@@ -0,0 +1,16 @@
+--TEST--
+"currency_names" function
+--TEMPLATE--
+{{ currency_names('UNKNOWN')|length }}
+{{ currency_names()|length }}
+{{ currency_names('fr')|length }}
+{{ currency_names()['USD'] }}
+{{ currency_names('fr')['USD'] }}
+--DATA--
+return [];
+--EXPECT--
+0
+292
+292
+US Dollar
+dollar des États-Unis
diff --git a/extra/intl-extra/Tests/Fixtures/language_names.test b/extra/intl-extra/Tests/Fixtures/language_names.test
new file mode 100644
index 000000000..bd30607f8
--- /dev/null
+++ b/extra/intl-extra/Tests/Fixtures/language_names.test
@@ -0,0 +1,16 @@
+--TEST--
+"language_names" function
+--TEMPLATE--
+{{ language_names('UNKNOWN')|length }}
+{{ language_names()|length }}
+{{ language_names('fr')|length }}
+{{ language_names()['fr'] }}
+{{ language_names('fr')['fr'] }}
+--DATA--
+return [];
+--EXPECT--
+0
+634
+634
+French
+français
diff --git a/extra/intl-extra/Tests/Fixtures/locale_names.test b/extra/intl-extra/Tests/Fixtures/locale_names.test
new file mode 100644
index 000000000..f7e830f66
--- /dev/null
+++ b/extra/intl-extra/Tests/Fixtures/locale_names.test
@@ -0,0 +1,16 @@
+--TEST--
+"locale_names" function
+--TEMPLATE--
+{{ locale_names('UNKNOWN')|length }}
+{{ locale_names()|length }}
+{{ locale_names('fr')|length }}
+{{ locale_names()['fr'] }}
+{{ locale_names('fr')['fr'] }}
+--DATA--
+return [];
+--EXPECT--
+0
+637
+637
+French
+français
diff --git a/extra/intl-extra/Tests/Fixtures/script_names.test b/extra/intl-extra/Tests/Fixtures/script_names.test
new file mode 100644
index 000000000..c65daf550
--- /dev/null
+++ b/extra/intl-extra/Tests/Fixtures/script_names.test
@@ -0,0 +1,16 @@
+--TEST--
+"script_names" function
+--TEMPLATE--
+{{ script_names('UNKNOWN')|length }}
+{{ script_names()|length }}
+{{ script_names('fr')|length }}
+{{ script_names()['Marc'] }}
+{{ script_names('fr')['Marc'] }}
+--DATA--
+return [];
+--EXPECT--
+0
+201
+201
+Marchen
+Marchen
diff --git a/extra/intl-extra/Tests/Fixtures/timezone_names.test b/extra/intl-extra/Tests/Fixtures/timezone_names.test
new file mode 100644
index 000000000..51b50704c
--- /dev/null
+++ b/extra/intl-extra/Tests/Fixtures/timezone_names.test
@@ -0,0 +1,16 @@
+--TEST--
+"timezone_names" function
+--TEMPLATE--
+{{ timezone_names('UNKNOWN')|length }}
+{{ timezone_names()|length }}
+{{ timezone_names('fr')|length }}
+{{ timezone_names()['Europe/Paris'] }}
+{{ timezone_names('fr')['Europe/Paris'] }}
+--DATA--
+return [];
+--EXPECT--
+0
+434
+434
+Central European Time (Paris)
+heure d’Europe centrale (Paris)