Module:az-last vowel

---

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local export = {}

function export._main(str)
  local last_vowel = nil

  for i = mw.ustring.len(str), 1, -1 do
    local char = mw.ustring.sub(str, i, i)
    if mw.ustring.find("AIOUEƏİÖÜaıoueəiöü", char, 1, true) then
      last_vowel = char
      break
    end
  end

  return last_vowel
end

function export.main(frame)
  return export._main(frame:getParent().args[1])
end

return export