diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 7e0bd64..513306b 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -466,7 +466,7 @@
 	    {
 		if (last_search_pat() == NULL)
 		{
-		    emsg(_(e_noprevre));
+		    emsg(_(e_no_previous_regular_expression));
 		    goto sortend;
 		}
 		regmatch.regprog = vim_regcomp(last_search_pat(), RE_MAGIC);
@@ -935,7 +935,7 @@
 	{
 	    if (prevcmd == NULL)
 	    {
-		emsg(_(e_noprev));
+		emsg(_(e_no_previous_command));
 		vim_free(newcmd);
 		return;
 	    }
@@ -2356,7 +2356,7 @@
 	else
 #endif
 	if (buf->b_p_ro)
-	    emsg(_(e_readonly));
+	    emsg(_(e_readonly_option_is_set_add_bang_to_override));
 	else
 	    semsg(_("E505: \"%s\" is read-only (add ! to override)"),
 		    buf->b_fname);
@@ -3763,7 +3763,7 @@
 	    {
 		if (old_sub == NULL)	// there is no previous command
 		{
-		    emsg(_(e_nopresub));
+		    emsg(_(e_no_previous_substitute_regular_expression));
 		    return;
 		}
 		sub = old_sub;
@@ -3779,7 +3779,7 @@
     {
 	if (old_sub == NULL)	// there is no previous command
 	{
-	    emsg(_(e_nopresub));
+	    emsg(_(e_no_previous_substitute_regular_expression));
 	    return;
 	}
 	pat = NULL;		// search_regcomp() will use previous pattern