--- a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/standard.properties	Fri Jan 12 14:01:52 2018 +0530
+++ b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/standard.properties	Fri Jan 12 11:41:32 2018 -0800
@@ -384,3 +384,11 @@
     name prefix followed by .*, which expands to all sub-packages\n\
     of the given package. Prefix the package specifier with - to\n\
     disable checks for the specified packages.
+
+# L10N: do not localize the option names -html4 and -html5
+doclet.HTML_version_not_specified=\
+    You have not specified the version of HTML to use.\n\
+    The default is currently HTML 4.01, but this will change to HTML5\n\
+    in a future release. To suppress this warning, please specify the\n\
+    version of HTML used in your documentation comments and to be\n\
+    generated by this doclet, using the -html4 or -html5 options.