Extend plugin languages

@Karmalakas, To add an extra translation for a plugin, you can do the following. Also see the docs about Translation Overrides.

Let's add 'Italian to the plugin:

• Lookup the string from the plugin you want to override. Eg from plugin 'Test' look in file user/plugins/test/languages.yaml:
  YAMLCopy

  en:
  PLUGIN_TEST:
    TEXT_VARIABLE: Text Variable
    TEXT_VARIABLE_HELP: Text to add to the top of a page
  

• Create file user/languages/it.yaml
• Copy the following into the new file:
  YAMLCopy

  PLUGIN_TEST:
  TEXT_VARIABLE: <Translation in Italian>
  TEXT_VARIABLE_HELP: <Translation in Italian>
  

• Add language it to user/config/system.yaml:
  YAMLCopy

  languages:
  supported: [en, it]
  

• If plugin Test has the snippet {{ 'PLUGIN_TEST.TEXT_VARIABLE' | t }} in a template , it will be translated into Italian when you browse to the Italian version of the page.