TYPO3: add warning text to all external links with regex

G201.typoscript

page.10.stdWrap.replacement {
  10 {
    search = #(<a.*?target="_blank".*?>)(.*?)(</a>)#i
    replace {
      wrap2 = ${1}${2} |${3}
      noTrimWrap = |<span class="show-for-sr"> |</span>|
      data = LLL:EXT:...locallang.xlf:link_open_in_new_windows
    }
    useRegExp = 1
  }
}