diff --git a/lib/shared/messages/add-members-message-spec.js b/lib/shared/messages/add-members-message-spec.js
index 93fcb2f3e..ea2bb6d42 100644
--- a/lib/shared/messages/add-members-message-spec.js
+++ b/lib/shared/messages/add-members-message-spec.js
@@ -1,185 +1,190 @@
 // @flow
 
 import invariant from 'invariant';
 
 import { messageTypes } from '../../types/message-types';
 import type {
   MessageInfo,
   ClientDBMessageInfo,
 } from '../../types/message-types';
 import type {
   AddMembersMessageData,
   AddMembersMessageInfo,
   RawAddMembersMessageInfo,
 } from '../../types/messages/add-members';
 import type { NotifTexts } from '../../types/notif-types';
 import type { ThreadInfo } from '../../types/thread-types';
 import type { RelativeUserInfo } from '../../types/user-types';
+import {
+  ET,
+  type EntityText,
+  pluralizeEntityText,
+} from '../../utils/entity-text';
 import { values } from '../../utils/objects';
 import {
   robotextForMessageInfo,
   robotextToRawString,
   removeCreatorAsViewer,
 } from '../message-utils';
 import type {
   CreateMessageInfoParams,
   MessageSpec,
   MessageTitleParam,
   NotificationTextsParams,
-  RobotextParams,
 } from './message-spec';
 import { joinResult } from './utils';
 
 export const addMembersMessageSpec: MessageSpec<
   AddMembersMessageData,
   RawAddMembersMessageInfo,
   AddMembersMessageInfo,
 > = Object.freeze({
   messageContentForServerDB(
     data: AddMembersMessageData | RawAddMembersMessageInfo,
   ): string {
     return JSON.stringify(data.addedUserIDs);
   },
 
   messageContentForClientDB(data: RawAddMembersMessageInfo): string {
     return this.messageContentForServerDB(data);
   },
 
   messageTitle({
     messageInfo,
     threadInfo,
     viewerContext,
   }: MessageTitleParam<AddMembersMessageInfo>) {
     let validMessageInfo: AddMembersMessageInfo = (messageInfo: AddMembersMessageInfo);
     if (viewerContext === 'global_viewer') {
       validMessageInfo = removeCreatorAsViewer(validMessageInfo);
       validMessageInfo = {
         ...validMessageInfo,
         addedMembers: validMessageInfo.addedMembers.map(item => ({
           ...item,
           isViewer: false,
         })),
       };
     }
     return robotextToRawString(
       robotextForMessageInfo(validMessageInfo, threadInfo),
     );
   },
 
   rawMessageInfoFromServerDBRow(row: Object): RawAddMembersMessageInfo {
     return {
       type: messageTypes.ADD_MEMBERS,
       id: row.id.toString(),
       threadID: row.threadID.toString(),
       time: row.time,
       creatorID: row.creatorID.toString(),
       addedUserIDs: JSON.parse(row.content),
     };
   },
 
   rawMessageInfoFromClientDB(
     clientDBMessageInfo: ClientDBMessageInfo,
   ): RawAddMembersMessageInfo {
     const content = clientDBMessageInfo.content;
     invariant(
       content !== undefined && content !== null,
       'content must be defined',
     );
     const rawAddMembersMessageInfo: RawAddMembersMessageInfo = {
       type: messageTypes.ADD_MEMBERS,
       id: clientDBMessageInfo.id,
       threadID: clientDBMessageInfo.thread,
       time: parseInt(clientDBMessageInfo.time),
       creatorID: clientDBMessageInfo.user,
       addedUserIDs: JSON.parse(content),
     };
     return rawAddMembersMessageInfo;
   },
 
   createMessageInfo(
     rawMessageInfo: RawAddMembersMessageInfo,
     creator: RelativeUserInfo,
     params: CreateMessageInfoParams,
   ): AddMembersMessageInfo {
     const addedMembers = params.createRelativeUserInfos(
       rawMessageInfo.addedUserIDs,
     );
     return {
       type: messageTypes.ADD_MEMBERS,
       id: rawMessageInfo.id,
       threadID: rawMessageInfo.threadID,
       creator,
       time: rawMessageInfo.time,
       addedMembers,
     };
   },
 
   rawMessageInfoFromMessageData(
     messageData: AddMembersMessageData,
     id: ?string,
   ): RawAddMembersMessageInfo {
     invariant(id, 'RawAddMembersMessageInfo needs id');
     return { ...messageData, id };
   },
 
-  robotext(
-    messageInfo: AddMembersMessageInfo,
-    creator: string,
-    params: RobotextParams,
-  ): string {
+  robotext(messageInfo: AddMembersMessageInfo): EntityText {
     const users = messageInfo.addedMembers;
     invariant(users.length !== 0, 'added who??');
-    const addedUsersString = params.robotextForUsers(users);
-    return `${creator} added ${addedUsersString}`;
+
+    const creator = ET.user({ userInfo: messageInfo.creator });
+    const addedUsers = pluralizeEntityText(
+      users.map(user => ET`${ET.user({ userInfo: user })}`),
+    );
+
+    return ET`${creator} added ${addedUsers}`;
   },
 
   notificationTexts(
     messageInfos: $ReadOnlyArray<MessageInfo>,
     threadInfo: ThreadInfo,
     params: NotificationTextsParams,
   ): NotifTexts {
     const addedMembersObject = {};
     for (const messageInfo of messageInfos) {
       invariant(
         messageInfo.type === messageTypes.ADD_MEMBERS,
         'messageInfo should be messageTypes.ADD_MEMBERS!',
       );
       for (const member of messageInfo.addedMembers) {
         addedMembersObject[member.id] = member;
       }
     }
     const addedMembers = values(addedMembersObject);
 
     const mostRecentMessageInfo = messageInfos[0];
     invariant(
       mostRecentMessageInfo.type === messageTypes.ADD_MEMBERS,
       'messageInfo should be messageTypes.ADD_MEMBERS!',
     );
     const mergedMessageInfo = { ...mostRecentMessageInfo, addedMembers };
 
     const robotext = params.strippedRobotextForMessageInfo(
       mergedMessageInfo,
       threadInfo,
     );
     const merged = `${robotext} to ${params.notifThreadName(threadInfo)}`;
     return {
       merged,
       title: threadInfo.uiName,
       body: robotext,
     };
   },
 
   notificationCollapseKey(rawMessageInfo: RawAddMembersMessageInfo): string {
     return joinResult(
       rawMessageInfo.type,
       rawMessageInfo.threadID,
       rawMessageInfo.creatorID,
     );
   },
 
   generatesNotifs: async () => undefined,
 
   userIDs(rawMessageInfo: RawAddMembersMessageInfo): $ReadOnlyArray<string> {
     return rawMessageInfo.addedUserIDs;
   },
 });
diff --git a/lib/shared/messages/remove-members-message-spec.js b/lib/shared/messages/remove-members-message-spec.js
index cbaa32e79..94b1d9e14 100644
--- a/lib/shared/messages/remove-members-message-spec.js
+++ b/lib/shared/messages/remove-members-message-spec.js
@@ -1,185 +1,190 @@
 // @flow
 
 import invariant from 'invariant';
 
 import { messageTypes } from '../../types/message-types';
 import type {
   MessageInfo,
   ClientDBMessageInfo,
 } from '../../types/message-types';
 import type {
   RawRemoveMembersMessageInfo,
   RemoveMembersMessageData,
   RemoveMembersMessageInfo,
 } from '../../types/messages/remove-members';
 import type { NotifTexts } from '../../types/notif-types';
 import type { ThreadInfo } from '../../types/thread-types';
 import type { RelativeUserInfo } from '../../types/user-types';
+import {
+  ET,
+  type EntityText,
+  pluralizeEntityText,
+} from '../../utils/entity-text';
 import { values } from '../../utils/objects';
 import {
   robotextForMessageInfo,
   robotextToRawString,
   removeCreatorAsViewer,
 } from '../message-utils';
 import type {
   CreateMessageInfoParams,
   MessageSpec,
   MessageTitleParam,
   NotificationTextsParams,
-  RobotextParams,
 } from './message-spec';
 import { joinResult } from './utils';
 
 export const removeMembersMessageSpec: MessageSpec<
   RemoveMembersMessageData,
   RawRemoveMembersMessageInfo,
   RemoveMembersMessageInfo,
 > = Object.freeze({
   messageContentForServerDB(
     data: RemoveMembersMessageData | RawRemoveMembersMessageInfo,
   ): string {
     return JSON.stringify(data.removedUserIDs);
   },
 
   messageContentForClientDB(data: RawRemoveMembersMessageInfo): string {
     return this.messageContentForServerDB(data);
   },
 
   messageTitle({
     messageInfo,
     threadInfo,
     viewerContext,
   }: MessageTitleParam<RemoveMembersMessageInfo>) {
     let validMessageInfo: RemoveMembersMessageInfo = (messageInfo: RemoveMembersMessageInfo);
     if (viewerContext === 'global_viewer') {
       validMessageInfo = removeCreatorAsViewer(validMessageInfo);
       validMessageInfo = {
         ...validMessageInfo,
         removedMembers: validMessageInfo.removedMembers.map(item => ({
           ...item,
           isViewer: false,
         })),
       };
     }
     return robotextToRawString(
       robotextForMessageInfo(validMessageInfo, threadInfo),
     );
   },
 
   rawMessageInfoFromServerDBRow(row: Object): RawRemoveMembersMessageInfo {
     return {
       type: messageTypes.REMOVE_MEMBERS,
       id: row.id.toString(),
       threadID: row.threadID.toString(),
       time: row.time,
       creatorID: row.creatorID.toString(),
       removedUserIDs: JSON.parse(row.content),
     };
   },
 
   rawMessageInfoFromClientDB(
     clientDBMessageInfo: ClientDBMessageInfo,
   ): RawRemoveMembersMessageInfo {
     const content = clientDBMessageInfo.content;
     invariant(
       content !== undefined && content !== null,
       'content must be defined',
     );
     const rawRemoveMembersMessageInfo: RawRemoveMembersMessageInfo = {
       type: messageTypes.REMOVE_MEMBERS,
       id: clientDBMessageInfo.id,
       threadID: clientDBMessageInfo.thread,
       time: parseInt(clientDBMessageInfo.time),
       creatorID: clientDBMessageInfo.user,
       removedUserIDs: JSON.parse(content),
     };
     return rawRemoveMembersMessageInfo;
   },
 
   createMessageInfo(
     rawMessageInfo: RawRemoveMembersMessageInfo,
     creator: RelativeUserInfo,
     params: CreateMessageInfoParams,
   ): RemoveMembersMessageInfo {
     const removedMembers = params.createRelativeUserInfos(
       rawMessageInfo.removedUserIDs,
     );
     return {
       type: messageTypes.REMOVE_MEMBERS,
       id: rawMessageInfo.id,
       threadID: rawMessageInfo.threadID,
       creator,
       time: rawMessageInfo.time,
       removedMembers,
     };
   },
 
   rawMessageInfoFromMessageData(
     messageData: RemoveMembersMessageData,
     id: ?string,
   ): RawRemoveMembersMessageInfo {
     invariant(id, 'RawRemoveMembersMessageInfo needs id');
     return { ...messageData, id };
   },
 
-  robotext(
-    messageInfo: RemoveMembersMessageInfo,
-    creator: string,
-    params: RobotextParams,
-  ): string {
+  robotext(messageInfo: RemoveMembersMessageInfo): EntityText {
     const users = messageInfo.removedMembers;
-    invariant(users.length !== 0, 'removed who??');
-    const removedUsersString = params.robotextForUsers(users);
-    return `${creator} removed ${removedUsersString}`;
+    invariant(users.length !== 0, 'added who??');
+
+    const creator = ET.user({ userInfo: messageInfo.creator });
+    const removedUsers = pluralizeEntityText(
+      users.map(user => ET`${ET.user({ userInfo: user })}`),
+    );
+
+    return ET`${creator} removed ${removedUsers}`;
   },
 
   notificationTexts(
     messageInfos: $ReadOnlyArray<MessageInfo>,
     threadInfo: ThreadInfo,
     params: NotificationTextsParams,
   ): NotifTexts {
     const removedMembersObject = {};
     for (const messageInfo of messageInfos) {
       invariant(
         messageInfo.type === messageTypes.REMOVE_MEMBERS,
         'messageInfo should be messageTypes.REMOVE_MEMBERS!',
       );
       for (const member of messageInfo.removedMembers) {
         removedMembersObject[member.id] = member;
       }
     }
     const removedMembers = values(removedMembersObject);
 
     const mostRecentMessageInfo = messageInfos[0];
     invariant(
       mostRecentMessageInfo.type === messageTypes.REMOVE_MEMBERS,
       'messageInfo should be messageTypes.REMOVE_MEMBERS!',
     );
     const mergedMessageInfo = { ...mostRecentMessageInfo, removedMembers };
 
     const robotext = params.strippedRobotextForMessageInfo(
       mergedMessageInfo,
       threadInfo,
     );
     const merged = `${robotext} from ${params.notifThreadName(threadInfo)}`;
     return {
       merged,
       title: threadInfo.uiName,
       body: robotext,
     };
   },
 
   notificationCollapseKey(rawMessageInfo: RawRemoveMembersMessageInfo): string {
     return joinResult(
       rawMessageInfo.type,
       rawMessageInfo.threadID,
       rawMessageInfo.creatorID,
     );
   },
 
   generatesNotifs: async () => undefined,
 
   userIDs(rawMessageInfo: RawRemoveMembersMessageInfo): $ReadOnlyArray<string> {
     return rawMessageInfo.removedUserIDs;
   },
 });
diff --git a/lib/utils/entity-text.js b/lib/utils/entity-text.js
index c4891e252..9baa3cbc0 100644
--- a/lib/utils/entity-text.js
+++ b/lib/utils/entity-text.js
@@ -1,304 +1,317 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 
 import { threadNoun } from '../shared/thread-utils';
 import { stringForUser } from '../shared/user-utils';
 import {
   threadTypes,
   type ThreadType,
   type RawThreadInfo,
   type ThreadInfo,
 } from '../types/thread-types';
+import { basePluralize } from '../utils/text-utils';
 
 type UserEntity = {
   +type: 'user',
   +id: string,
   +username?: ?string,
   +isViewer?: ?boolean,
   +possessive?: ?boolean, // eg. `user's` instead of `user`
 };
 
 // Comments explain how thread name will appear from user4's perspective
 type ThreadEntity =
   | {
       +type: 'thread',
       +id: string,
       +name?: ?string,
       // displays threadInfo.name if set, or 'user1, user2, and user3'
       +display: 'uiName',
       +uiName: string,
     }
   | {
       +type: 'thread',
       +id: string,
       +name?: ?string,
       // displays threadInfo.name if set, or eg. 'this thread' or 'this chat'
       +display: 'shortName',
       +threadType?: ?ThreadType,
       +alwaysDisplayShortName?: ?boolean, // don't default to name
       +possessive?: ?boolean, // eg. `this thread's` instead of `this thread`
     };
 
 type ColorEntity = {
   +type: 'color',
   +hex: string,
 };
 
 type EntityTextComponent = UserEntity | ThreadEntity | ColorEntity | string;
 
 export type EntityText = $ReadOnlyArray<EntityTextComponent>;
 
 const entityTextFunction = (
   strings: $ReadOnlyArray<string>,
   ...entities: $ReadOnlyArray<EntityTextComponent | EntityText>
 ) => {
   const result = [];
   for (let i = 0; i < strings.length; i++) {
     const str = strings[i];
     if (str) {
       result.push(str);
     }
     const entity = entities[i];
     if (!entity) {
       continue;
     }
 
     if (typeof entity === 'string') {
       const lastResult = result.length > 0 && result[result.length - 1];
       if (typeof lastResult === 'string') {
         result[result.length - 1] = lastResult + entity;
       } else {
         result.push(entity);
       }
     } else if (Array.isArray(entity)) {
       const [firstEntity, ...restOfEntity] = entity;
       const lastResult = result.length > 0 && result[result.length - 1];
       if (typeof lastResult === 'string' && typeof firstEntity === 'string') {
         result[result.length - 1] = lastResult + firstEntity;
       } else if (firstEntity) {
         result.push(firstEntity);
       }
       result.push(...restOfEntity);
     } else {
       result.push(entity);
     }
   }
   return result;
 };
 
 // defaults to shortName
 type EntityTextThreadInput =
   | {
       +display: 'uiName',
       +threadInfo: ThreadInfo,
     }
   | {
       +display?: 'shortName',
       +threadInfo: ThreadInfo | RawThreadInfo,
       +possessive?: ?boolean,
     }
   | {
       +display: 'alwaysDisplayShortName',
       +threadInfo: ThreadInfo | RawThreadInfo,
       +possessive?: ?boolean,
     }
   | {
       +display: 'alwaysDisplayShortName',
       +threadID: string,
       +possessive?: ?boolean,
     };
 entityTextFunction.thread = (input: EntityTextThreadInput) => {
   if (input.display === 'uiName') {
     const { threadInfo } = input;
     return {
       type: 'thread',
       id: threadInfo.id,
       name: threadInfo.name,
       display: 'uiName',
       uiName: threadInfo.uiName,
     };
   }
   if (input.display === 'alwaysDisplayShortName' && input.threadID) {
     const { threadID, possessive } = input;
     return {
       type: 'thread',
       id: threadID,
       name: undefined,
       display: 'shortName',
       threadType: undefined,
       alwaysDisplayShortName: true,
       possessive,
     };
   } else if (input.display === 'alwaysDisplayShortName' && input.threadInfo) {
     const { threadInfo, possessive } = input;
     return {
       type: 'thread',
       id: threadInfo.id,
       name: threadInfo.name,
       display: 'shortName',
       threadType: threadInfo.type,
       alwaysDisplayShortName: true,
       possessive,
     };
   } else if (input.display === 'shortName' || !input.display) {
     const { threadInfo, possessive } = input;
     return {
       type: 'thread',
       id: threadInfo.id,
       name: threadInfo.name,
       display: 'shortName',
       threadType: threadInfo.type,
       possessive,
     };
   }
   invariant(
     false,
     `ET.thread passed unexpected display type: ${input.display}`,
   );
 };
 
 type EntityTextUserInput = {
   +userInfo: {
     +id: string,
     +username?: ?string,
     +isViewer?: ?boolean,
     ...
   },
   +possessive?: ?boolean,
 };
 entityTextFunction.user = (input: EntityTextUserInput) => ({
   type: 'user',
   id: input.userInfo.id,
   username: input.userInfo.username,
   isViewer: input.userInfo.isViewer,
   possessive: input.possessive,
 });
 
 type EntityTextColorInput = { +hex: string };
 entityTextFunction.color = (input: EntityTextColorInput) => ({
   type: 'color',
   hex: input.hex,
 });
 
 // ET is a JS tag function used in template literals, eg. ET`something`
 // It allows you to compose raw text and "entities" together
 type EntityTextFunction = ((
   strings: $ReadOnlyArray<string>,
   ...entities: $ReadOnlyArray<EntityTextComponent | EntityText>
 ) => EntityText) & {
   +thread: EntityTextThreadInput => ThreadEntity,
   +user: EntityTextUserInput => UserEntity,
   +color: EntityTextColorInput => ColorEntity,
   ...
 };
 const ET: EntityTextFunction = entityTextFunction;
 
 type MakePossessiveInput = { +str: string, +isViewer?: ?boolean };
 function makePossessive(input: MakePossessiveInput) {
   if (input.isViewer) {
     return 'your';
   }
   return `${input.str}’s`;
 }
 
 function getNameForThreadEntity(entity: ThreadEntity): string {
   const { name: userGeneratedName, display } = entity;
   if (entity.display === 'uiName') {
     return userGeneratedName ? userGeneratedName : entity.uiName;
   }
   invariant(
     entity.display === 'shortName',
     `getNameForThreadEntity can't handle thread entity display ${display}`,
   );
 
   let name = userGeneratedName;
   if (!name || entity.alwaysDisplayShortName) {
     const threadType = entity.threadType ?? threadTypes.PERSONAL;
     name = `this ${threadNoun(threadType)}`;
   }
   if (entity.possessive) {
     name = makePossessive({ str: name });
   }
   return name;
 }
 
 function getNameForUserEntity(entity: UserEntity): string {
   const str = stringForUser(entity);
   const { isViewer, possessive } = entity;
   if (!possessive) {
     return str;
   }
   return makePossessive({ str, isViewer });
 }
 
 function entityTextToRawString(entityText: EntityText): string {
   const textParts = entityText.map(entity => {
     if (typeof entity === 'string') {
       return entity;
     } else if (entity.type === 'thread') {
       return getNameForThreadEntity(entity);
     } else if (entity.type === 'color') {
       return entity.hex;
     } else if (entity.type === 'user') {
       return getNameForUserEntity(entity);
     } else {
       invariant(
         false,
         `entityTextToRawString can't handle entity type ${entity.type}`,
       );
     }
   });
   return textParts.join('');
 }
 
 type RenderFunctions = {
   +renderText: ({ +text: string }) => React.Node,
   +renderThread: ({ +id: string, +name: string }) => React.Node,
   +renderColor: ({ +hex: string }) => React.Node,
 };
 function entityTextToReact(
   entityText: EntityText,
   threadID: string,
   renderFuncs: RenderFunctions,
 ): React.Node {
   const { renderText, renderThread, renderColor } = renderFuncs;
   return entityText.map((entity, i) => {
     const key = `text${i}`;
     if (typeof entity === 'string') {
       return (
         <React.Fragment key={key}>
           {renderText({ text: entity })}
         </React.Fragment>
       );
     } else if (entity.type === 'thread') {
       const { id } = entity;
       const name = getNameForThreadEntity(entity);
       if (id === threadID) {
         return name;
       } else {
         return (
           <React.Fragment key={key}>
             {renderThread({ id, name })}
           </React.Fragment>
         );
       }
     } else if (entity.type === 'color') {
       return (
         <React.Fragment key={key}>
           {renderColor({ hex: entity.hex })}
         </React.Fragment>
       );
     } else if (entity.type === 'user') {
       return getNameForUserEntity(entity);
     } else {
       invariant(
         false,
         `entityTextToReact can't handle entity type ${entity.type}`,
       );
     }
   });
 }
 
-export { ET, entityTextToRawString, entityTextToReact };
+function pluralizeEntityText(
+  nouns: $ReadOnlyArray<EntityText>,
+  maxNumberOfNouns: number = 3,
+): EntityText {
+  return basePluralize<EntityText>(
+    nouns,
+    maxNumberOfNouns,
+    (a: EntityText | string, b: ?EntityText | string) =>
+      b ? ET`${a}${b}` : ET`${a}`,
+  );
+}
+
+export { ET, entityTextToRawString, entityTextToReact, pluralizeEntityText };