Ticket #26553: 26553.2.diff

src/wp-includes/comment-template.php

@@ -1290 +1290 @@
         }
         if ( false === $more ) {
                 /* translators: 1: Opening span tag with a class, 2: post title, 3: closing span tag, 4: number of comments */
-                $more = sprintf( __( '%4$d Comments%1$s on %2$s%3$s' ), $span, $title, $span_close, $number );
+                $more = _n( '%4$d Comment%1$s on %2$s%3$s', '%4$d Comments%1$s on %2$s%3$s', $number );
+                $more = sprintf( $more, $span, $title, $span_close, number_format_i18n( $number ) );
         }
         if ( false === $none ) {
                 /* translators: 1: Opening span tag with a class, 2: post title, 3: closing span tag */