diff --git a/lib/shared/message-utils.js b/lib/shared/message-utils.js
--- a/lib/shared/message-utils.js
+++ b/lib/shared/message-utils.js
@@ -32,6 +32,7 @@
 import { type ThreadInfo } from '../types/thread-types';
 import type { RelativeUserInfo, UserInfos } from '../types/user-types';
 import { type EntityText, entityTextToRawString } from '../utils/entity-text';
+import { pluralize } from '../utils/text-utils';
 import { codeBlockRegex, type ParserRules } from './markdown';
 import { messageSpecs } from './messages/message-specs';
 import { threadIsGroupChat } from './thread-utils';
@@ -67,21 +68,7 @@
 }
 
 function robotextForUsers(users: RelativeUserInfo[]): string {
-  if (users.length === 1) {
-    return robotextForUser(users[0]);
-  } else if (users.length === 2) {
-    return `${robotextForUser(users[0])} and ${robotextForUser(users[1])}`;
-  } else if (users.length === 3) {
-    return (
-      `${robotextForUser(users[0])}, ${robotextForUser(users[1])}, ` +
-      `and ${robotextForUser(users[2])}`
-    );
-  } else {
-    return (
-      `${robotextForUser(users[0])}, ${robotextForUser(users[1])}, ` +
-      `and ${users.length - 2} others`
-    );
-  }
+  return pluralize(users.map(robotextForUser), 3);
 }
 
 function encodedThreadEntity(threadID: string, text: string): string {