diff --git a/src/wp-includes/l10n.php b/src/wp-includes/l10n.php
index 419ebc3817..ff2bbf7787 100644
--- a/src/wp-includes/l10n.php
+++ b/src/wp-includes/l10n.php
@@ -169,7 +169,7 @@ function determine_locale() {
  * @param string $text   Text to translate.
  * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
  *                       Default 'default'.
- * @return string Translated text
+ * @return string Translated text.
  */
 function translate( $text, $domain = 'default' ) {
 	$translations = get_translations_for_domain( $domain );
@@ -210,8 +210,7 @@ function before_last_bar( $string ) {
 /**
  * Retrieve the translation of $text in the context defined in $context.
  *
- * If there is no translation, or the text domain isn't loaded the original
- * text is returned.
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
  *
  * *Note:* Don't use translate_with_gettext_context() directly, use _x() or related functions.
  *
@@ -282,7 +281,7 @@ function esc_attr__( $text, $domain = 'default' ) {
  * @param string $text   Text to translate.
  * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
  *                       Default 'default'.
- * @return string Translated text
+ * @return string Translated text.
  */
 function esc_html__( $text, $domain = 'default' ) {
 	return esc_html( translate( $text, $domain ) );
@@ -304,6 +303,11 @@ function _e( $text, $domain = 'default' ) {
 /**
  * Display translated text that has been escaped for safe use in an attribute.
  *
+ * Encodes `< > & " '` (less than, greater than, ampersand, double quote, single quote).
+ * Will never double encode entities.
+ *
+ * If you need the value for use in PHP, use esc_attr__().
+ *
  * @since 2.8.0
  *
  * @param string $text   Text to translate.
@@ -317,6 +321,11 @@ function esc_attr_e( $text, $domain = 'default' ) {
 /**
  * Display translated text that has been escaped for safe use in HTML output.
  *
+ * If there is no translation, or the text domain isn't loaded, the original text
+ * is escaped and displayed.
+ *
+ * If you need the value for use in PHP, use esc_html__().
+ *
  * @since 2.8.0
  *
  * @param string $text   Text to translate.
@@ -366,13 +375,16 @@ function _ex( $text, $context, $domain = 'default' ) {
 /**
  * Translate string with gettext context, and escapes it for safe use in an attribute.
  *
+ * If there is no translation, or the text domain isn't loaded, the original text
+ * is escaped and returned.
+ *
  * @since 2.8.0
  *
  * @param string $text    Text to translate.
  * @param string $context Context information for the translators.
  * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
  *                        Default 'default'.
- * @return string Translated text
+ * @return string Translated text.
  */
 function esc_attr_x( $text, $context, $domain = 'default' ) {
 	return esc_attr( translate_with_gettext_context( $text, $context, $domain ) );
@@ -381,6 +393,9 @@ function esc_attr_x( $text, $context, $domain = 'default' ) {
 /**
  * Translate string with gettext context, and escapes it for safe use in HTML output.
  *
+ * If there is no translation, or the text domain isn't loaded, the original text
+ * is escaped and returned.
+ *
  * @since 2.9.0
  *
  * @param string $text    Text to translate.