This is the module for the template {{Lang-zh}}. Its main features are described on that template's documentation page, refer to that for how to use it in articles. This documentation describes some particular features of the module.

The first table in the module lists the articles in which the template will put traditional Chinese first. Add articles to this list in the same fashion (the order doesn't matter) to include them. If you cannot edit the module because its protected use the {{edit template-protected}} template on its talk page to request a change.

Use from other modules

ပလေဝ်ဒါန်

The module can be called directly from another module as well as a template. To do this first load the module

local Zh = require("Module:Lang-zh")._Zh

Then call it as follows, with the arguments in a table

local output = Zh{["c"] = "中国", ["p"] = "zhōngguó"}

require('strict')

local p = {}

-- articles in which traditional Chinese preceeds simplified Chinese
local t1st = {
	["228 Incident"] = true,
	["Chinese calendar"] = true,
	["Lippo Centre, Hong Kong"] = true,
	["Republic of China"] = true,
	["Republic of China at the 1924 Summer Olympics"] = true,
	["Taiwan"] = true,
	["Taiwan (island)"] = true,
	["Taiwan Province"] = true,
	["Wei Boyang"] = true,
}

-- the labels for each part 
local labels = {
	["c"] = "Chinese",
	["s"] = "simplified Chinese",
	["t"] = "traditional Chinese",
	["p"] = "pinyin",
	["tp"] = "Tongyong Pinyin",
	["w"] = "Wade–Giles",
	["j"] = "Jyutping",
	["cy"] = "Cantonese Yale",
	["sl"] = "Sidney Lau",
	["poj"] = "Pe̍h-ōe-jī",
	["zhu"] = "Zhuyin Fuhao",
	["l"] = "lit.",
	["tr"] = "trans.",
}

-- article titles for wikilinks for each part
local wlinks = {
	["c"] = "Chinese language",
	["s"] = "simplified Chinese characters",
	["t"] = "traditional Chinese characters",
	["p"] = "pinyin",
	["tp"] = "Tongyong Pinyin",
	["w"] = "Wade–Giles",
	["j"] = "Jyutping",
	["cy"] = "Yale romanization of Cantonese",
	["sl"] = "Sidney Lau romanisation",
	["poj"] = "Pe̍h-ōe-jī",
	["zhu"] = "Bopomofo",
	["l"] = "Literal translation",
	["tr"] = "Translation",
}

-- for those parts which are to be treated as languages their ISO code
local ISOlang = {
	["c"] = "zh",
	["t"] = "zh-Hant",
	["s"] = "zh-Hans",
	["p"] = "zh-Latn-pinyin",
	["tp"] = "zh-Latn",
	["w"] = "zh-Latn-wadegile",
	["j"] = "yue-Latn-jyutping",
	["cy"] = "yue-Latn",
	["sl"] = "yue-Latn",
	["poj"] = "nan-Latn",
	["zhu"] = "zh-Bopo",
}

local italic = {
	["p"] = true,
	["tp"] = true,
	["w"] = true,
	["j"] = true,
	["cy"] = true,
	["sl"] = true,
	["poj"] = true,
}

local superscript = {
	["w"] = true,
	["sl"] = true,
}
-- Categories for different kinds of Chinese text
local cats = {
	["c"] = "[[Category:Articles containing Chinese-language text]]",
	["s"] = "[[Category:Articles containing simplified Chinese-language text]]",
	["t"] = "[[Category:Articles containing traditional Chinese-language text]]",
}

function p.Zh(frame)
	-- load arguments module to simplify handling of args
	local getArgs = require('Module:Arguments').getArgs
	
	local args = getArgs(frame)
	return p._Zh(args)
end
	
function p._Zh(args)
	local uselinks = not (args["links"] == "no") -- whether to add links
	local uselabels = not (args["labels"] == "no") -- whether to have labels
	local capfirst = args["scase"] ~= nil
 
	local t1 = false -- whether traditional Chinese characters go first
	local j1 = false -- whether Cantonese Romanisations go first
	local testChar
	if (args["first"]) then
	 	 for testChar in mw.ustring.gmatch(args["first"], "%a+") do
			if (testChar == "t") then
				t1 = true
			 end
			if (testChar == "j") then
				j1 = true
			 end
		end
	end
	if (t1 == false) then
		local title = mw.title.getCurrentTitle()
		t1 = t1st[title.text] == true
	end

	-- based on setting/preference specify order
	local orderlist = {"c", "s", "t", "p", "tp", "w", "j", "cy", "sl", "poj", "zhu", "l", "tr"}
	if (t1) then
		orderlist[2] = "t"
		orderlist[3] = "s"
	end
	if (j1) then
		orderlist[4] = "j"
		orderlist[5] = "cy"
		orderlist[6] = "sl"
		orderlist[7] = "p"
		orderlist[8] = "tp"
		orderlist[9] = "w"
	end
	
	-- rename rules. Rules to change parameters and labels based on other parameters
	if args["hp"] then
		-- hp an alias for p ([hanyu] pinyin)
		args["p"] = args["hp"]
	end
	if args["tp"] then
		-- if also Tongyu pinyin use full name for Hanyu pinyin
		labels["p"] = "Hanyu Pinyin"
	end
	
	if (args["s"] and args["s"] == args["t"]) then
		-- Treat simplified + traditional as Chinese if they're the same
		args["c"] = args["s"]
		args["s"] = nil
		args["t"] = nil
	elseif (not (args["s"] and args["t"])) then
		-- use short label if only one of simplified and traditional
		labels["s"] = labels["c"]
		labels["t"] = labels["c"]
	end

	local body = "" -- the output string
	local params -- for creating HTML spans
	local label -- the label, i.e. the bit preceeding the supplied text
	local val -- the supplied text
	
	-- go through all possible fields in loop, adding them to the output
	for i, part in ipairs(orderlist) do
		if (args[part]) then
			-- build label
			label = ""
			if (uselabels) then
				label = labels[part]
				if (capfirst) then
					label = mw.language.getContentLanguage():ucfirst(label)
					capfirst = false
				end
				if (uselinks) then
					label = "[[" .. wlinks[part] .. "|" .. label .. "]]"
				end
				if (labels[part] ~= "lit.") then
					label = label .. ":"
				else
					label = "<small>" .. label .. "</small>"
				end
				label = label .. " "
			end
			-- build value
			val = args[part]
			if (cats[part]) and mw.title.getCurrentTitle().namespace == 0 then
				-- if has associated category AND current page in article namespace, add category
				val = cats[part] .. val
			end
			if (ISOlang[part]) then
				-- add span for language if needed
				params = {["lang"] = ISOlang[part]}
				val = mw.text.tag({name="span",attrs=params, content=val})
			elseif ((part == "l") or (part == "tr")) then
				-- put literals in quotes
				val = "'" .. val .. "'"
			end
			if (italic[part]) then
				-- italicise
				val = "<i>" .. val .. "</i>"
			end
			if string.match(val, "</?sup>") then val = val.."[[Category:Pages using template Zh with sup tags]]" end
			if (superscript[part]) then
				-- superscript
				val = val:gsub("(%d)", "<sup>%1</sup>"):gsub("(%d)</sup>%*<sup>(%d)", "%1*%2"):gsub("<sup><sup>([%d%*]+)</sup></sup>", "<sup>%1</sup>")
			end
			-- add both to body
			body = body .. label .. val .. "; "
		end
	end
	
	if (body > "") then -- check for empty string
		return string.sub(body, 1, -3) -- chop off final semicolon and space
	else --no named parameters; see if there's a first parameter, ignoring its name
		if (args[1]) then
			-- if there is treat it as Chinese
			label = ""
			if (uselabels) then
				label = labels["c"]
				if (uselinks) then
					label = "[[" .. wlinks["c"] .. "|" .. label .. "]]"
				end
				label = label .. "&#58; "
			end
			-- default to show links and labels as no options given
			if mw.title.getCurrentTitle().namespace == 0 then
				-- if current page in article namespace
				val = cats["c"] .. args[1]
			else
				val = args[1]
			end
			params = {["lang"] = ISOlang["c"]}
			val = mw.text.tag({name="span",attrs=params, content=val})
			return label .. val
		end
		return ""
	end
end

return p