Language Keys are processed as Literal Text in custom MVC Portlets

Issue

• When creating a MVC Portlet that leverages language keys, language key output is presenting as the literal text, rather than the key value
• For example: 
  • Language key in view.jsp:

    • <b><liferay-ui:message key="languagekeys.caption"/></b> 

  • Language Key Value in language.properties:

    • languagekeys.caption=Hello from LanguageKeys!

  • Expected Output: "Hello from LanguageKeys!"
  • Actual Output: Languagekeys.caption

Environment

• Liferay 2024.Q1.12
• Liferay Workspace

Resolution

• This issue has been verified on lower versions of Liferay Workspace
• Updating Liferay Workspace to the most recent version (for example: 10.1.9) and rebuilding the modules may resolve the issue
• To check if the correct fix is applied, check if the following "Provide-Capability" section is added to the bnd.bnd file

• Bundle-Name: Test2Portlet
  Bundle-SymbolicName: test2portlet
  Bundle-Version: 1.0.0
  Export-Package: test2portlet.constants
  
  Provide-Capability:\
  liferay.language.resources;\
  resource.bundle.base.name="content.Language"

Additional Information

• Liferay Learn: Liferay Workspace
• Liferay Learn: Using Localized Messages in an MVC Portlet
• Liferay Learn: Using a JSP and MVC Portlet