This module will transliterate text in the อักษรมองโกเลีย. It is used to transliterate บูร์ยัต, มองโกเลียคลาสสิก, Daur, มองโกเลีย, สันสกฤต, Dukhan, ทิเบตคลาสสิก, มองโกเลียกลาง, and Khamnigan Mongol. The module should preferably not be called directly from templates or other modules. To use it from a template, use {{xlit}}. Within a module, use Module:languages#Language:transliterate.

For testcases, see Module:Mong-translit/testcases.

tr(text, lang, sc)
Transliterates a given piece of text written in the script specified by the code sc, and language specified by the code lang.
When the transliteration fails, returns nil.

local export = {}

local oneChar = {
	["ᠠ"] = "a", ["ᠡ"] = "e", ["ᠢ"] = "i", ["ᠣ"] = "o", ["ᠤ"] = "u", ["ᠥ"] = "ö", ["ᠦ"] = "ü", ["ᠧ"] = "ē", ["ᠨ"] = "n", ["ᠩ"] = "ŋ", ["ᠪ"] = "b", ["ᠫ"] = "p", ["ᠬ"] = "q", ["ᠭ"] = "ɣ", ["ᠮ"] = "m", ["ᠯ"] = "l", ["ᠰ"] = "s", ["ᠱ"] = "š", ["ᠲ"] = "t", ["ᠳ"] = "d", ["ᠴ"] = "č", ["ᡸ"] = "š̤", ["ᠵ"] = "ǰ", ["ᠶ"] = "y", ["ᠷ"] = "r", ["ᠸ"] = "w", ["ᠹ"] = "f", ["ᠺ"] = "k", ["ᠻ"] = "kh", ["ᠼ"] = "c", ["ᠽ"] = "z", ["ᠾ"] = "h", ["ᠿ"] = "ž", ["ᡀ"] = "lh", ["ᡁ"] = "zh", ["ᡂ"] = "ch",
	["᠐"] = "0", ["᠑"] = "1", ["᠒"] = "2", ["᠓"] = "3", ["᠔"] = "4", ["᠕"] = "5", ["᠖"] = "6", ["᠗"] = "7", ["᠘"] = "8", ["᠙"] = "9",
	["᠂"] = ",", ["᠃"] = ".", ["᠄"] = ":", ["᠁"] = "…", ["︖"] = "?", ["︕"] = "!", [" "] = "-", ["᠊"] = "-",
	["᠋"] = "", ["᠌"] = "", ["᠍"] = "", ["᠏"] = "", ["᠎"] = "'"
}

local twoChars = {
	["ᠠᠢ"] = "ai̯", ["ᠡᠢ"] = "ei̯", ["ᠣᠢ"] = "oi̯", ["ᠤᠢ"] = "ui̯", ["ᠦᠢ"] = "üi̯", ["ᠧᠢ"] = "ēi̯"
}

function export.tr(text, lang, sc)
	if sc ~= "Mong" then
		return nil
	elseif mw.ustring.match(text, "ᠥᠢ") or mw.ustring.match(text, "ᠥᠶᠢ") then
		local diphthong = mw.ustring.match(text, "ᠥᠶ?ᠢ")
		error("Diphthong " .. diphthong .. " does not exist. Please replace with " .. mw.ustring.gsub(diphthong, "ᠥ", "ᠦ") .. ".")
	end
	for digraph, replacement in pairs(twoChars) do
		text = string.gsub(text, digraph, replacement)
	end
	text = mw.ustring.gsub(text, ".", oneChar)
	text = mw.ustring.gsub(text, "q([eöü ])", "k%1")
	text = mw.ustring.gsub(text, "q$", "k")
	text = mw.ustring.gsub(text, "ɣ([eöü ])", "g%1")
	text = mw.ustring.gsub(text, "ɣ$", "g")
	return text
end

return export