get_user_locale() WordPress Function

function get_user_locale( $user_id = 0 ) {
	$user = false;
	if ( 0 === $user_id && function_exists( 'wp_get_current_user' ) ) {
		$user = wp_get_current_user();
	} elseif ( $user_id instanceof WP_User ) {
		$user = $user_id;
	} elseif ( $user_id && is_numeric( $user_id ) ) {
		$user = get_user_by( 'id', $user_id );
	}

	if ( ! $user ) {
		return get_locale();
	}

	$locale = $user->locale;
	return $locale ? $locale : get_locale();
}
Uses	Description
wp-includes/l10n.php:get_locale()	Retrieves the current locale.
wp-includes/pluggable.php:wp_get_current_user()	Retrieve the current user object.
wp-includes/pluggable.php:get_user_by()	Retrieve user info by a given field
Used By	Description
wp-includes/rest-api/endpoints/class-wp-rest-pattern-directory-controller.php:WP_REST_Pattern_Directory_Controller::get_items()	Search and retrieve block patterns metadata
wp-includes/ms-functions.php:wpmu_new_site_admin_notification()	Notifies the Multisite network administrator that a new site was created.
wp-admin/includes/class-wp-debug-data.php:WP_Debug_Data::debug_data()	Static function for generating site debug data when required.
wp-includes/l10n.php:determine_locale()	Determine the current locale desired for the request.
wp-includes/script-loader.php:wp_default_packages_vendor()	Registers all the WordPress vendor scripts that are in the standardized `js/dist/vendor/` location.
wp-includes/script-loader.php:wp_default_packages_inline_scripts()	Adds inline scripts required for the WordPress JavaScript packages.
wp-includes/user.php:_wp_privacy_send_erasure_fulfillment_notification()	Notifies the user when their erasure request is fulfilled.
wp-includes/user.php:wp_send_user_request()	Send a confirmation request email to confirm an action.
wp-admin/includes/privacy-tools.php:wp_privacy_send_personal_data_export_email()	Send an email to the user with a link to the personal data export file
wp-includes/ms-functions.php:update_network_option_new_admin_email()	Sends a confirmation request email when a change of network admin email address is attempted.
wp-includes/class-wp-editor.php:_WP_Editors::get_mce_locale()	Returns the TinyMCE locale.
wp-admin/includes/class-wp-community-events.php:WP_Community_Events::get_request_args()	Builds an array of args to use in an HTTP request to the w.org Events API.
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php:WP_REST_Users_Controller::prepare_item_for_response()	Prepares a single user output for response.
wp-includes/customize/class-wp-customize-selective-refresh.php:WP_Customize_Selective_Refresh::export_preview_data()	Exports data in preview after it has finished rendering so that partials can be added at runtime.
wp-includes/user.php:retrieve_password()	Handles sending a password retrieval email to a user.
wp-admin/includes/theme.php:themes_api()	Retrieves theme installer pages from the WordPress.org Themes API.
wp-admin/includes/misc.php:update_option_new_admin_email()	Sends a confirmation request email when a change of site admin email address is attempted.
wp-admin/includes/plugin-install.php:plugins_api()	Retrieves plugin installer pages from the WordPress.org Plugins API.
wp-admin/includes/dashboard.php:wp_dashboard_cached_rss_widget()	Checks to see if all of the feed url in $check_urls are cached.
wp-admin/includes/dashboard.php:wp_dashboard_rss_control()	The RSS dashboard widget control.
wp-admin/includes/dashboard.php:wp_dashboard_browser_nag()	Displays the browser update nag.
wp-admin/includes/class-wp-plugin-install-list-table.php:WP_Plugin_Install_List_Table::prepare_items()
wp-admin/includes/template.php:iframe_header()	Generic Iframe header for use with Thickbox.
wp-admin/includes/import.php:wp_get_popular_importers()	Returns a list from WordPress.org of popular importer plugins.
wp-admin/includes/credits.php:wp_credits()	Retrieve the contributor credits.
wp-includes/class-wp-customize-manager.php:WP_Customize_Manager::customize_preview_settings()	Prints JavaScript settings for preview frame.
wp-includes/pluggable.php:wp_new_user_notification()	Email login credentials to a newly-registered user.
wp-includes/class-wp-theme.php:WP_Theme::sort_by_name()	Sorts themes by name.
wp-includes/functions.php:wp_auth_check_html()	Output the HTML that shows the wp-login dialog when the user is no longer logged in.
wp-includes/user.php:wp_update_user()	Updates a user in the database.
wp-includes/ms-functions.php:wpmu_welcome_user_notification()	Notifies a user that their account activation has been successful.
wp-includes/ms-functions.php:wpmu_welcome_notification()	Notifies the site administrator that their site activation was successful.
wp-includes/ms-functions.php:wpmu_signup_blog_notification()	Sends a confirmation request email to a user when they sign up for a new site. The new site will not become active until the confirmation link is clicked.
wp-includes/ms-functions.php:wpmu_signup_user_notification()	Sends a confirmation request email to a user when they sign up for a new user account (without signing up for a site at the same time). The user account will not become active until the confirmation link is clicked.
wp-includes/class-wp-customize-widgets.php:WP_Customize_Widgets::export_preview_data()	Communicates the sidebars that appeared on the page at the very end of the page, and at the very end of the wp_footer,
wp-includes/class-wp-editor.php:_WP_Editors::editor_settings()