diff --git a/composer.json b/composer.json
index 882060a..f9ad761 100644
--- a/composer.json
+++ b/composer.json
@@ -81,7 +81,7 @@
       "test -f ./bin/strauss.phar || curl -o bin/strauss.phar -L -C - https://github.com/BrianHenryIE/strauss/releases/download/0.26.5/strauss.phar"
     ],
     "clean-faker-lang": [
-      "[ -d './vendor/fakerphp/faker/src/Faker/Provider' ] && echo 'Removing folders:' && find ./vendor/fakerphp/faker/src/Faker/Provider -mindepth 1 -maxdepth 1 -type d ! -name 'en_US' -print -exec rm -r {} + || true"
+      "[ -d './vendor/fakerphp/faker/src/Faker/Provider' ] && echo 'Removing folders:' && find ./vendor/fakerphp/faker/src/Faker/Provider -mindepth 1 -maxdepth 1 -type d ! -name 'en_US' ! -name 'fr_FR' ! -name 'de_DE' ! -name 'es_ES' ! -name 'pt_BR' ! -name 'it_IT' ! -name 'nl_NL' ! -name 'ja_JP' ! -name 'zh_CN' ! -name 'ru_RU' -print -exec rm -r {} + || true"
     ],
     "strauss": [
       "@strauss-install",
diff --git a/src/FakerPress/Module/Abstract_Module.php b/src/FakerPress/Module/Abstract_Module.php
index e100edf..d60b88c 100644
--- a/src/FakerPress/Module/Abstract_Module.php
+++ b/src/FakerPress/Module/Abstract_Module.php
@@ -2,7 +2,9 @@
 
 namespace FakerPress\Module;
 
+use FakerPress\ThirdParty\Faker\Factory;
 use FakerPress\ThirdParty\Faker\Generator;
+use function FakerPress\fakerpress_get_available_locales;
 use function FakerPress\is_truthy;
 
 /**
@@ -41,6 +43,15 @@ abstract class Abstract_Module implements Interface_Module {
 	 */
 	protected $provider_class;
 
+	/**
+	 * Faker locale for generated content.
+	 *
+	 * @since 0.10.0
+	 *
+	 * @var ?string
+	 */
+	protected ?string $locale = null;
+
 	/**
 	 * Stores the generated data.
 	 *
@@ -108,7 +119,11 @@ public function get_amount_allowed(): int {
 	 */
 	public function get_faker(): Generator {
 		if ( ! $this->faker ) {
-			$this->faker = \FakerPress\ThirdParty\Faker\Factory::create();
+			$locale = $this->locale && isset( fakerpress_get_available_locales()[ $this->locale ] )
+				? $this->locale
+				: Factory::DEFAULT_LOCALE;
+
+			$this->faker = Factory::create( $locale );
 
 			// We need to merge the Provider to the Dependencies, so everything is loaded.
 			$providers = array_merge( $this->get_dependencies(), (array) $this->get_provider_class() );
@@ -123,6 +138,30 @@ public function get_faker(): Generator {
 		return $this->faker;
 	}
 
+	/**
+	 * Set the Faker locale for generated content.
+	 *
+	 * @since 0.10.0
+	 *
+	 * @param ?string $locale Locale code (e.g. 'fr_FR'), or null for default.
+	 *
+	 * @return self
+	 */
+	public function set_locale( ?string $locale ): self {
+		$locale = '' !== $locale ? $locale : null;
+
+		// Invalidate any cached faker when the locale changes, so the generator is
+		// rebuilt with the new locale on the next get_faker() call. Without this,
+		// the first get_faker() pins the locale for the entire request.
+		if ( $this->locale !== $locale ) {
+			$this->faker = null;
+		}
+
+		$this->locale = $locale;
+
+		return $this;
+	}
+
 	/**
 	 * Filters the dependencies classes for this module.
 	 *
diff --git a/src/FakerPress/Module/Attachment.php b/src/FakerPress/Module/Attachment.php
index dc4e073..56dd90c 100644
--- a/src/FakerPress/Module/Attachment.php
+++ b/src/FakerPress/Module/Attachment.php
@@ -5,6 +5,7 @@
 use FakerPress\Provider\Image\LoremPicsum;
 use WP_Error;
 use FakerPress;
+use function FakerPress\get;
 
 class Attachment extends Abstract_Module {
 
@@ -306,6 +307,8 @@ public function parse_request( $qty, $request = [] ) {
 		// The quantity is already calculated by the REST endpoint or passed directly
 		// We should use the $qty parameter, not recalculate from request
 
+		$this->set_locale( get( $request, 'locale', null ) );
+
 		// Process date range
 		if ( isset( $request['interval_date'] ) ) {
 			$date_range = [
diff --git a/src/FakerPress/Module/Comment.php b/src/FakerPress/Module/Comment.php
index 77f781c..6f69213 100644
--- a/src/FakerPress/Module/Comment.php
+++ b/src/FakerPress/Module/Comment.php
@@ -133,6 +133,8 @@ public function parse_request( int $qty, array $request = [] ) {
 			return new WP_Error( 'fakerpress_zero_comments', __( 'Zero is not a good number of comments to fake...', 'fakerpress' ) );
 		}
 
+		$this->set_locale( get( $request, 'locale', null ) );
+
 		$comment_content_size      = get( $request, 'content_size', [ 1, 5 ] );
 		$comment_content_use_html  = is_truthy( get( $request, 'use_html', 'off' ) );
 		$comment_content_html_tags = array_map( 'trim', explode( ',', get( $request, 'html_tags' ) ) );
diff --git a/src/FakerPress/Module/Post.php b/src/FakerPress/Module/Post.php
index 0860e2f..163c6d7 100644
--- a/src/FakerPress/Module/Post.php
+++ b/src/FakerPress/Module/Post.php
@@ -130,6 +130,8 @@ public function parse_request( int $qty, array $request = [] ) {
 			return new WP_Error( 'fakerpress_zero_posts', __( 'Zero is not a good number of posts to fake...', 'fakerpress' ) );
 		}
 
+		$this->set_locale( get( $request, 'locale', null ) );
+
 		// Fetch Comment Status
 		$comment_status = get( $request, 'comment_status', '' );
 		$comment_status = array_map( 'trim', explode( ',', $comment_status ) );
diff --git a/src/FakerPress/Module/Term.php b/src/FakerPress/Module/Term.php
index 7a5a8de..14ef9ba 100644
--- a/src/FakerPress/Module/Term.php
+++ b/src/FakerPress/Module/Term.php
@@ -109,6 +109,8 @@ public function parse_request( int $qty, array $request = [] ) {
 			return new WP_Error( 'fakerpress_zero_terms', __( 'Zero is not a good number of terms to fake...', 'fakerpress' ) );
 		}
 
+		$this->set_locale( get( $request, 'locale', null ) );
+
 		$name_size = get( $request, 'size' );
 
 		// Fetch taxonomies
diff --git a/src/FakerPress/Module/User.php b/src/FakerPress/Module/User.php
index eccf778..6f03112 100644
--- a/src/FakerPress/Module/User.php
+++ b/src/FakerPress/Module/User.php
@@ -136,6 +136,8 @@ public function parse_request( int $qty, array $request = [] ) {
 			return new WP_Error( 'fakerpress_zero_users', __( 'Zero is not a good number of users to fake...', 'fakerpress' ) );
 		}
 
+		$this->set_locale( get( $request, 'locale', null ) );
+
 		$description_size      = get( $request, 'description_size', [ 1, 5 ] );
 		$description_use_html  = get( $request, 'use_html', 'off' ) === 'on';
 		$description_html_tags = array_map( 'trim', explode( ',', get( $request, 'html_tags', '' ) ) );
diff --git a/src/FakerPress/Plugin.php b/src/FakerPress/Plugin.php
index c04212c..ab9ecae 100644
--- a/src/FakerPress/Plugin.php
+++ b/src/FakerPress/Plugin.php
@@ -167,6 +167,7 @@ protected function static_load(): void {
 		require_once $this->plugin_path . 'src' . DIRECTORY_SEPARATOR . 'functions' . DIRECTORY_SEPARATOR . 'conditionals.php';
 		require_once $this->plugin_path . 'src' . DIRECTORY_SEPARATOR . 'functions' . DIRECTORY_SEPARATOR . 'sorting.php';
 		require_once $this->plugin_path . 'src' . DIRECTORY_SEPARATOR . 'functions' . DIRECTORY_SEPARATOR . 'assets.php';
+		require_once $this->plugin_path . 'src' . DIRECTORY_SEPARATOR . 'functions' . DIRECTORY_SEPARATOR . 'locale.php';
 	}
 
 	/**
diff --git a/src/FakerPress/REST/Abstract_Endpoint.php b/src/FakerPress/REST/Abstract_Endpoint.php
index 7b6fb57..f502236 100644
--- a/src/FakerPress/REST/Abstract_Endpoint.php
+++ b/src/FakerPress/REST/Abstract_Endpoint.php
@@ -15,6 +15,8 @@
 use WP_REST_Server;
 use WP_Error;
 
+use function FakerPress\fakerpress_get_available_locales;
+
 /**
  * Abstract class Abstract_Endpoint
  *
@@ -388,6 +390,31 @@ protected function get_batching_args(): array {
 		];
 	}
 
+	/**
+	 * Get the locale argument definition shared across all generation endpoints.
+	 *
+	 * @since 0.10.0
+	 *
+	 * @return array
+	 */
+	protected function get_locale_args(): array {
+		return [
+			'locale' => [
+				'description'       => __( 'Locale for generated content (e.g. fr_FR, de_DE). Falls back to en_US.', 'fakerpress' ),
+				'type'              => 'string',
+				'default'           => null,
+				'sanitize_callback' => 'sanitize_text_field',
+				'validate_callback' => function ( $value ) {
+					if ( $value === null || '' === $value ) {
+						return true;
+					}
+
+					return isset( fakerpress_get_available_locales()[ $value ] );
+				},
+			],
+		];
+	}
+
 	/**
 	 * Convert endpoint args to request schema format.
 	 *
diff --git a/src/FakerPress/REST/Endpoints/Attachments.php b/src/FakerPress/REST/Endpoints/Attachments.php
index c69bcf7..89a43f3 100644
--- a/src/FakerPress/REST/Endpoints/Attachments.php
+++ b/src/FakerPress/REST/Endpoints/Attachments.php
@@ -295,7 +295,8 @@ protected function get_endpoint_args(): array {
 					'type'        => 'object',
 				],
 			],
-			$this->get_batching_args()
+			$this->get_batching_args(),
+			$this->get_locale_args()
 		);
 	}
 
diff --git a/src/FakerPress/REST/Endpoints/Comments.php b/src/FakerPress/REST/Endpoints/Comments.php
index 90f22e2..755a24c 100644
--- a/src/FakerPress/REST/Endpoints/Comments.php
+++ b/src/FakerPress/REST/Endpoints/Comments.php
@@ -226,7 +226,8 @@ protected function get_endpoint_args(): array {
 					'type'        => 'object',
 				],
 			],
-			$this->get_batching_args()
+			$this->get_batching_args(),
+			$this->get_locale_args()
 		);
 	}
 
diff --git a/src/FakerPress/REST/Endpoints/Posts.php b/src/FakerPress/REST/Endpoints/Posts.php
index 6d88624..6baa158 100644
--- a/src/FakerPress/REST/Endpoints/Posts.php
+++ b/src/FakerPress/REST/Endpoints/Posts.php
@@ -245,7 +245,8 @@ protected function get_endpoint_args(): array {
 					'type'        => 'object',
 				],
 			],
-			$this->get_batching_args()
+			$this->get_batching_args(),
+			$this->get_locale_args()
 		);
 	}
 
diff --git a/src/FakerPress/REST/Endpoints/Terms.php b/src/FakerPress/REST/Endpoints/Terms.php
index 9e55092..67f5816 100644
--- a/src/FakerPress/REST/Endpoints/Terms.php
+++ b/src/FakerPress/REST/Endpoints/Terms.php
@@ -229,7 +229,8 @@ protected function get_endpoint_args(): array {
 					'type'        => 'object',
 				],
 			],
-			$this->get_batching_args()
+			$this->get_batching_args(),
+			$this->get_locale_args()
 		);
 	}
 
diff --git a/src/FakerPress/REST/Endpoints/Users.php b/src/FakerPress/REST/Endpoints/Users.php
index 75802e7..042f058 100644
--- a/src/FakerPress/REST/Endpoints/Users.php
+++ b/src/FakerPress/REST/Endpoints/Users.php
@@ -225,7 +225,8 @@ protected function get_endpoint_args(): array {
 					'type'        => 'object',
 				],
 			],
-			$this->get_batching_args()
+			$this->get_batching_args(),
+			$this->get_locale_args()
 		);
 	}
 
diff --git a/src/FakerPress/REST/Traits/Handles_Batching.php b/src/FakerPress/REST/Traits/Handles_Batching.php
index abf9c37..99f3ea3 100644
--- a/src/FakerPress/REST/Traits/Handles_Batching.php
+++ b/src/FakerPress/REST/Traits/Handles_Batching.php
@@ -31,6 +31,14 @@ trait Handles_Batching {
 	 * @return array Array containing quantity, offset, total, and is_capped.
 	 */
 	protected function calculate_batched_quantity( $params, $module ) {
+		// Apply the requested locale before any get_faker() call below, so the
+		// generator is built with the right locale on first instantiation. parse_request()
+		// sets it again later, but that runs after this method may have already cached
+		// an en_US faker via numberBetween() for a qty range.
+		if ( isset( $params['locale'] ) ) {
+			$module->set_locale( $params['locale'] );
+		}
+
 		$allowed = $module->get_amount_allowed();
 		$offset  = absint( $params['offset'] ?? 0 );
 		$total   = absint( $params['total'] ?? 0 );
diff --git a/src/functions/locale.php b/src/functions/locale.php
new file mode 100644
index 0000000..6c4dad7
--- /dev/null
+++ b/src/functions/locale.php
@@ -0,0 +1,35 @@
+<?php
+namespace FakerPress;
+
+/**
+ * Locale helper functions for FakerPress.
+ *
+ * @since 0.10.0
+ *
+ * @package FakerPress
+ */
+
+/**
+ * Returns the curated list of available Faker locales for FakerPress.
+ *
+ * Each locale code corresponds to a directory under
+ * vendor/prefixed/fakerphp/faker/src/Faker/Provider/.
+ *
+ * @since 0.10.0
+ *
+ * @return array Associative array of locale code => human-readable label.
+ */
+function fakerpress_get_available_locales(): array {
+	return [
+		'en_US' => 'English (United States)',
+		'fr_FR' => 'French (France)',
+		'de_DE' => 'German (Germany)',
+		'es_ES' => 'Spanish (Spain)',
+		'pt_BR' => 'Portuguese (Brazil)',
+		'it_IT' => 'Italian (Italy)',
+		'nl_NL' => 'Dutch (Netherlands)',
+		'ja_JP' => 'Japanese (Japan)',
+		'zh_CN' => 'Chinese (Simplified, China)',
+		'ru_RU' => 'Russian (Russia)',
+	];
+}
diff --git a/src/templates/pages/attachments.php b/src/templates/pages/attachments.php
index c16d5ad..6beb4d1 100644
--- a/src/templates/pages/attachments.php
+++ b/src/templates/pages/attachments.php
@@ -197,6 +197,27 @@
 	]
 );
 
+$_locale_options = [];
+foreach ( fakerpress_get_available_locales() as $locale_code => $locale_label ) {
+	$_locale_options[] = [
+		'id'   => $locale_code,
+		'text' => $locale_label,
+	];
+}
+
+$fields[] = new Field(
+	'dropdown',
+	[
+		'id'           => 'locale',
+		'options'      => $_locale_options,
+		'value'        => 'en_US',
+	],
+	[
+		'label'       => __( 'Locale', 'fakerpress' ),
+		'description' => __( 'Language for generated content. Falls back to English if the locale data is unavailable.', 'fakerpress' ),
+	]
+);
+
 $fields[] = new Field(
 	'meta',
 	[
diff --git a/src/templates/pages/comments.php b/src/templates/pages/comments.php
index 4f95cf1..38662ba 100644
--- a/src/templates/pages/comments.php
+++ b/src/templates/pages/comments.php
@@ -146,6 +146,27 @@
 	]
 );
 
+$_locale_options = [];
+foreach ( fakerpress_get_available_locales() as $locale_code => $locale_label ) {
+	$_locale_options[] = [
+		'id'   => $locale_code,
+		'text' => $locale_label,
+	];
+}
+
+$fields[] = new Field(
+	'dropdown',
+	[
+		'id'           => 'locale',
+		'options'      => $_locale_options,
+		'value'        => 'en_US',
+	],
+	[
+		'label'       => __( 'Locale', 'fakerpress' ),
+		'description' => __( 'Language for generated content. Falls back to English if the locale data is unavailable.', 'fakerpress' ),
+	]
+);
+
 $fields[] = new Field(
 	'meta',
 	[
diff --git a/src/templates/pages/posts.php b/src/templates/pages/posts.php
index e5ed42c..62a2d3a 100644
--- a/src/templates/pages/posts.php
+++ b/src/templates/pages/posts.php
@@ -223,6 +223,27 @@
 	]
 );
 
+$_locale_options = [];
+foreach ( fakerpress_get_available_locales() as $locale_code => $locale_label ) {
+	$_locale_options[] = [
+		'id'   => $locale_code,
+		'text' => $locale_label,
+	];
+}
+
+$fields[] = new Field(
+	'dropdown',
+	[
+		'id'           => 'locale',
+		'options'      => $_locale_options,
+		'value'        => 'en_US',
+	],
+	[
+		'label'       => __( 'Locale', 'fakerpress' ),
+		'description' => __( 'Language for generated content. Falls back to English if the locale data is unavailable.', 'fakerpress' ),
+	]
+);
+
 $fields[] = new Field(
 	'meta',
 	[
diff --git a/src/templates/pages/terms.php b/src/templates/pages/terms.php
index 720125f..a09ed66 100644
--- a/src/templates/pages/terms.php
+++ b/src/templates/pages/terms.php
@@ -47,6 +47,27 @@
 	]
 );
 
+$_locale_options = [];
+foreach ( fakerpress_get_available_locales() as $locale_code => $locale_label ) {
+	$_locale_options[] = [
+		'id'   => $locale_code,
+		'text' => $locale_label,
+	];
+}
+
+$fields[] = new Field(
+	'dropdown',
+	[
+		'id'           => 'locale',
+		'options'      => $_locale_options,
+		'value'        => 'en_US',
+	],
+	[
+		'label'       => __( 'Locale', 'fakerpress' ),
+		'description' => __( 'Language for generated content. Falls back to English if the locale data is unavailable.', 'fakerpress' ),
+	]
+);
+
 if ( version_compare( $GLOBALS['wp_version'], '4.4-beta', '>=' ) ) {
 	$fields[] = new Field(
 		'meta',
diff --git a/src/templates/pages/users.php b/src/templates/pages/users.php
index 33d5564..4d144c2 100644
--- a/src/templates/pages/users.php
+++ b/src/templates/pages/users.php
@@ -87,6 +87,27 @@
 	]
 );
 
+$_locale_options = [];
+foreach ( fakerpress_get_available_locales() as $locale_code => $locale_label ) {
+	$_locale_options[] = [
+		'id'   => $locale_code,
+		'text' => $locale_label,
+	];
+}
+
+$fields[] = new Field(
+	'dropdown',
+	[
+		'id'           => 'locale',
+		'options'      => $_locale_options,
+		'value'        => 'en_US',
+	],
+	[
+		'label'       => __( 'Locale', 'fakerpress' ),
+		'description' => __( 'Language for generated content. Falls back to English if the locale data is unavailable.', 'fakerpress' ),
+	]
+);
+
 $fields[] = new Field(
 	'meta',
 	[