diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index 32fa55c9df..b585d05c23 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -3778,15 +3778,19 @@ function _deprecated_function( $function, $version, $replacement = null ) {
 	 */
 	if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
 		if ( function_exists( '__' ) ) {
-			if ( ! is_null( $replacement ) )
+			if ( ! is_null( $replacement ) ) {
+				/* translators: 1: PHP function name, 2: version number, 3: alternative function name */
 				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
-			else
+			} else {
+				/* translators: 1: PHP function name, 2: version number */
 				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
+			}
 		} else {
-			if ( ! is_null( $replacement ) )
+			if ( ! is_null( $replacement ) ) {
 				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $function, $version, $replacement ) );
-			else
+			} else {
 				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
+			}
 		}
 	}
 }
@@ -3902,15 +3906,19 @@ function _deprecated_file( $file, $version, $replacement = null, $message = '' )
 	if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
 		$message = empty( $message ) ? '' : ' ' . $message;
 		if ( function_exists( '__' ) ) {
-			if ( ! is_null( $replacement ) )
+			if ( ! is_null( $replacement ) ) {
+				/* translators: 1: PHP file name, 2: version number, 3: alternative file name */
 				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message );
-			else
+			} else {
+				/* translators: 1: PHP file name, 2: version number */
 				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message );
+			}
 		} else {
-			if ( ! is_null( $replacement ) )
+			if ( ! is_null( $replacement ) ) {
 				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $file, $version, $replacement ) . $message );
-			else
+			} else {
 				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.', $file, $version ) . $message );
+			}
 		}
 	}
 }
@@ -3962,15 +3970,19 @@ function _deprecated_argument( $function, $version, $message = null ) {
 	 */
 	if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
 		if ( function_exists( '__' ) ) {
-			if ( ! is_null( $message ) )
+			if ( ! is_null( $message ) ) {
+				/* translators: 1: PHP function name, 2: version number, 3: optional message regarding the change */
 				trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) );
-			else
+			} else {
+				/* translators: 1: PHP function name, 2: version number */
 				trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
+			}
 		} else {
-			if ( ! is_null( $message ) )
+			if ( ! is_null( $message ) ) {
 				trigger_error( sprintf( '%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s', $function, $version, $message ) );
-			else
+			} else {
 				trigger_error( sprintf( '%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
+			}
 		}
 	}
 }
@@ -4018,8 +4030,10 @@ function _deprecated_hook( $hook, $version, $replacement = null, $message = null
 	if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) {
 		$message = empty( $message ) ? '' : ' ' . $message;
 		if ( ! is_null( $replacement ) ) {
+			/* translators: 1: PHP hook name, 2: version number, 3: alternative hook name */
 			trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), $hook, $version, $replacement ) . $message );
 		} else {
+			/* translators: 1: PHP hook name, 2: version number */
 			trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.' ), $hook, $version ) . $message );
 		}
 	}