title: NSIS change page subtitle
body: <p>I want to support german and english for my setup. German is default.
  I replaced MUI_TEXT_COMPONENTS_SUBTITLE for all languages.
  For german my replaced subtitle is shown in the exe. But when i change the language in the exe (UMUI_PAGE_MULTILANGUAGE) to english, the standard title (from the nsis language files) is shown.
  If i put english to default language my replaced title is shown.</p>
  
  <p>What goes wrong here?</p>
  
  <pre><code>...
  !define MUI_TEXT_COMPONENTS_SUBTITLE         $(MUI_TEXT_COMPONENTS_SUBTITLE_MY)
  ...
  !insertmacro MUI_RESERVEFILE_INSTALLOPTIONS
  !insertmacro UMUI_PAGE_MULTILANGUAGE
  !insertmacro MUI_PAGE_COMPONENTS
  ...
  
  !insertmacro MUI_LANGUAGE "German" ; first language is the default language
  !insertmacro MUI_LANGUAGE "English"
  
  LangString MUI_TEXT_COMPONENTS_SUBTITLE_MY ${LANG_GERMAN}      "Wählen Sie die     Komponenten aus, die Sie installieren möchten."
  LangString MUI_TEXT_COMPONENTS_SUBTITLE_MY ${LANG_ENGLISH}     "Choose which features you want to install."
  ...
  </code></pre>