Message Boards email notifications are not displaying localized translation templates

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: Master
• Fix Version/s: 7.1.0 Beta 1
• Component/s: Collaboration, Message Boards
• Labels: None
• Fix Priority: 3
• Bug Type: Regression Bug

Steps to reproduce:

1. Add the following properties to portal-ext:

   message.boards.email.bulk=false
   message.boards.message.formats.default=html
   pop.server.notifications.enabled=truepop.server.subdomain=
   
   mail.session.mail.pop3.host=pop.gmail.com
   mail.session.mail.pop3.password=
   mail.session.mail.pop3.port=995
   mail.session.mail.pop3.user=
   
   mail.session.mail.smtp.auth=truemail.session.mail.smtp.host=smtp.gmail.com
   mail.session.mail.smtp.password=
   mail.session.mail.smtp.port=465
   mail.session.mail.smtp.user=
   
   mail.session.mail.store.protocol=pop3
   mail.session.mail.transport.protocol=smtp
   
   

1. Start up portal and login as Test (User 1)
2. Navigate to Content > Message Boards > Configuration > Message Added Email and modify the Subject and Body to the following:
   English:
   Subject: [$CATEGORY_NAME$] English
   Body: [$CATEGORY_NAME$] English
   Japanese:
   Subject: [$CATEGORY_NAME$] 日本語
   Body: [$CATEGORY_NAME$] 日本語
3. Navigate to Account Settings and use a valid email as email address
4. Set default language for User 1 as English
5. Navigate to Virtual Instances and edit Mail Domain to be gmail.com
6. Add a user (User 2) with a valid email address
7. Set default language of User 2 to 日本語 (日本)
8. As User 1, navigate to the page and add a Message Boards portlet and Language Selector portlet
9. Subscribe to the Message Boards with both Users
10. As User 1, set the language in Language Selector to Japanese and add a new thread

Expected result:
Expected each user to receive emails with the following content:
User 1: Home - Liferay English
User 2: ホーム - Liferay 日本語

Actual result: 
Each user received emails with the following content:
User 1: ホーム - Liferay 日本語
User 2: ホーム - Liferay 日本語

Reproduced on:
Tomcat 9.0.6 + MySQL 5.7
Portal master GIT ID: 1b2003392d7795f38ab4daf4c1805d7b7561f760