Use new function wp_get_word_count_type()

lib/experimental/l10n.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * PHP and WordPress configuration compatibility functions for the Gutenberg
+ * editor plugin changes related to i18n.
+ *
+ * @package gutenberg
+ */
+
+/**
+ * Override core's wp_get_word_count_type() introduced in WordPress 6.2.
+ * Originally, get_word_count_type() method of the WP_Locale class is executed,
+ * but the process is simulated here.
+ *
+ * This function should not be backported to core.
+ */
+if ( ! function_exists( 'wp_get_word_count_type' ) ) {
+	/**
+	 * Retrieves the word count type based on the locale.
+	 *
+	 * @return string Locale-specific word count type.
+	 */
+	function wp_get_word_count_type() {
+		$word_count_type = _x( 'words', 'Word count type. Do not translate!', 'gutenberg' );
+
+		// Check for valid types.
+		if ( 'characters_excluding_spaces' !== $word_count_type && 'characters_including_spaces' !== $word_count_type ) {
+			// Defaults to 'words'.
+			$word_count_type = 'words';
+		}
+		return $word_count_type;
+	}
+}

lib/load.php

@@ -108,6 +108,7 @@ function gutenberg_is_experiment_enabled( $name ) {
 require __DIR__ . '/experimental/navigation-theme-opt-in.php';
 require __DIR__ . '/experimental/kses.php';
 require __DIR__ . '/experimental/formatting.php';
+require __DIR__ . '/experimental/l10n.php';
 
 // Fonts API.
 require __DIR__ . '/experimental/fonts-api/class-wp-fonts-provider.php';

packages/block-library/src/post-time-to-read/index.php

@@ -27,12 +27,7 @@ function render_block_core_post_time_to_read( $attributes, $content, $block ) {
 	 */
 	$average_reading_rate = 189;
 
-	/*
-	 * translators: If your word count is based on single characters (e.g. East Asian characters),
-	 * enter 'characters_excluding_spaces' or 'characters_including_spaces'. Otherwise, enter 'words'.
-	 * Do not translate into your own language.
-	 */
-	$word_count_type = _x( 'words', 'Word count type. Do not translate!' );
+	$word_count_type = wp_get_word_count_type();
 
 	$minutes_to_read = max( 1, (int) round( wp_word_count( $content, $word_count_type ) / $average_reading_rate ) );