diff --git a/Mk/Scripts/check_spdx.lua b/Mk/Scripts/check_spdx.lua
new file mode 100755
--- /dev/null
+++ b/Mk/Scripts/check_spdx.lua
@@ -0,0 +1,490 @@
+#!/usr/libexec/flua
+
+local ucl
+local ucl_paths = {
+	"/usr/lib/flua/ucl.so",
+	"/usr/local/lib/lua/5.4/ucl.so"
+}
+
+for _, path in ipairs(ucl_paths) do
+	if io.open(path) then
+		package.cpath = path .. ";" .. package.cpath
+		ucl = require("ucl")
+		break
+	end
+end
+
+if not ucl then
+	io.stderr:write("[!] Could not load ucl module from known paths\n")
+	os.exit(1)
+end
+
+local args = {...}
+local debug = false
+local license_file = nil
+local scan_tree = false
+local scriptsdir = os.getenv("SCRIPTSDIR")
+local wrksrc = nil
+
+local BASEDIR = "/var/db/ports-licenses"
+local NORMDIR = BASEDIR .. "/normalized"
+local TIMESTAMP = BASEDIR .. "/.timestamp"
+-- local LICENSE_LIST_URL = "https://spdx.org/licenses/licenses.json"
+-- local LICENSE_BASE_URL = "https://spdx.org/licenses/"
+local LICENSE_LIST_URL = "https://fdp.bofh.network/licenses/licenses.json"
+local LICENSE_BASE_URL = "https://fdp.bofh.network/licenses/"
+local TMP_LICENSE_LIST = "/tmp/licenses.json"
+local TMP_LICENSE_JSON = "/tmp/license.json"
+local DAYS_VALID = 30
+local FETCH = 'fetch -q -o %s --user-agent="User-Agent: spdx-checker/1.0" %s'
+local TMPDIR = "/tmp"
+local colors = {
+	reset = "\27[0m",
+	red = "\27[31m",
+	green = "\27[32m",
+	yellow = "\27[33m",
+	blue = "\27[34m",
+	magenta = "\27[35m",
+	cyan = "\27[36m",
+	bold = "\27[1m"
+}
+
+local function usage()
+	print("Usage: check_spdx.lua [-h] [-d] [-f <license_file>] [-s]")
+	print("  -h    Show help and exit")
+	print("  -d    Enable debug output")
+	print("  -f    Path to LICENSE_FILE to match against SPDX database")
+	print("  -s    Scan WRKSRC for SPDX headers in source files")
+	os.exit(0)
+end
+
+local function dprint(msg)
+	if debug then print(colors.cyan .. "[D] " .. msg .. colors.reset) end
+end
+
+-- Check if file exists
+local function file_exists(path)
+	local f = io.open(path, "r")
+	if f then
+		f:close()
+		return true
+	end
+	return false
+end
+
+local function cleanup(path)
+	local removed = 0
+	local stat = io.popen
+
+	-- If it's a direct file path, try to delete it
+	if file_exists(path) then
+		os.remove(path)
+	return 1
+	end
+
+	-- Otherwise treat it as a directory or glob pattern
+	-- We assume this means: clean matching files in a directory
+	local dir, pattern = path:match("^(.-)/([^/]-)$")
+	if not dir then
+		dir = path
+		pattern = ".*"
+	end
+
+	local cmd = string.format('find "%s" -type f -name "%s"', dir, pattern)
+	local p = stat(cmd)
+	if not p then return 0 end
+
+	for fname in p:lines() do
+		os.remove(fname)
+		print(colors.red .. "[*] Removed: " .. fname .. colors.reset)
+		removed = removed + 1
+	end
+
+	p:close()
+	return removed
+end
+
+-- Return true if timestamp is older than threshold
+local function is_stale(path, days)
+	local p = io.popen("stat -f %m " .. path)
+	local mtime = tonumber(p:read("*a") or "0") or 0
+	p:close()
+	return os.time() - mtime > (days * 86400)
+end
+
+local function read_file(path)
+	local f = io.open(path, "r")
+	if not f then return nil end
+	local content = f:read("*a")
+	f:close()
+	return content
+end
+
+local function parse_json_ucl(text)
+	local parser = ucl.parser()
+	if not parser:parse_string(text) then
+		return nil, "Failed to parse JSON with libucl"
+	end
+	return parser:get_object()
+end
+
+-- Normalize SPDX license text (same logic as Python)
+local function normalize(text)
+	-- Remove copyright lines
+	text = text:gsub("([^\n]*\n?)", function(line)
+		if line:match("^%s*Copyright") then
+			return ""
+		else
+			return line
+		end
+	end)
+
+
+	-- Convert to lowercase
+	text = text:lower()
+
+	-- Remove URLs
+	-- text = text:gsub("http[s]?://[%w%p]+", "")
+	text = text:gsub("[<%(%[]?https?://[%w%p]+[>%)%]]?", "")
+
+	-- Remove comments (only lines starting with comment symbols)
+	text = text:gsub("^%s*(//|#|/%*).*", "")
+
+	-- Remove end of terms and conditions
+	text = text:gsub("end of terms and conditions.*", "")
+
+	-- Remove EXHIBIT / APPENDIX etc. sections
+	text = text:gsub("(?i)(appendix|apaddendum|exhibit).*", "")
+
+	-- Replace fancy quotes with ASCII "
+	text = text:gsub("[“”„«»＂]", '')
+	text = text:gsub('"', '')
+
+	-- Replace copyright symbols
+	text = text:gsub("[©]", "(c)")
+	text = text:gsub("[Ⓒ]", "(c)")
+	text = text:gsub("[ⓒ]", "(c)")
+	text = text:gsub("%(c%)%(c%)", "(c)")
+
+	-- Remove bullets and numbering like 1., a), (i), *, etc.
+	text = text
+		:gsub("%f[%w][0-9a-z]%.%s", "")			-- 1. or a. at word boundary
+		:gsub("%([0-9a-zA-Z]+%)%s", "")			-- (1) or (a)
+		:gsub("%*%s", "")				-- * bullet
+		:gsub("%([ivxlcdmIVXLCDM]+%)%s", "")		-- (ii), (IV) roman numerals
+
+	-- Normalize leading header line if it's just a title
+	text = text:gsub("^(.-)license\\n", "")
+
+	-- British to American spelling variants
+	local replacements = {
+		['acknowledgment'] = 'acknowledgement',
+		['analogue'] = 'analog',
+		['analyse'] = 'analyze',
+		['artefact'] = 'artifact',
+		['authorisation'] = 'authorization',
+		['authorised'] = 'authorized',
+		['calibre'] = 'caliber',
+		['cancelled'] = 'canceled',
+		['capitalisations'] = 'capitalizations',
+		['catalogue'] = 'catalog',
+		['categorise'] = 'categorize',
+		['centre'] = 'center',
+		['emphasised'] = 'emphasized',
+		['favour'] = 'favor',
+		['favourite'] = 'favorite',
+		['fulfiling'] = 'fulfilling',
+		['fulfilment'] = 'fulfillment',
+		['initialise'] = 'initialize',
+		['judgment'] = 'judgement',
+		['labelling'] = 'labeling',
+		['labour'] = 'labor',
+		['licence'] = 'license',
+		['maximise'] = 'maximize',
+		['modelled'] = 'modeled',
+		['modelling'] = 'modeling',
+		['offence'] = 'offense',
+		['optimise'] = 'optimize',
+		['organisation'] = 'organization',
+		['organise'] = 'organize',
+		['practise'] = 'practice',
+		['programme'] = 'program',
+		['realise'] = 'realize',
+		['recognise'] = 'recognize',
+		['signalling'] = 'signaling',
+		['sub%-license'] = 'sublicense',
+		['sub license'] = 'sublicense',
+		['utilisation'] = 'utilization',
+		['whilst'] = 'while',
+		['wilful'] = 'wilfull',
+		['non%-commercial'] = 'noncommercial',
+		['per cent'] = 'percent',
+		['owner'] = 'holder'
+	}
+
+	for k, v in pairs(replacements) do
+		text = text:gsub(k, v)
+	end
+
+	-- Final pass: collapse all whitespace
+	text = text:gsub("%s+", " "):gsub("^%s+", ""):gsub("%s+$", "")
+	return text
+end
+
+-- Dice coefficient
+local function dice(a, b)
+	local function bigrams(s)
+		local set = {}
+		for i = 1, #s - 1 do
+			local bg = s:sub(i, i+1)
+			set[bg] = true
+		end
+		return set
+	end
+	local A, B = bigrams(a), bigrams(b)
+	local overlap, total = 0, 0
+	for k in pairs(A) do total = total + 1 end
+	for k in pairs(B) do
+		total = total + 1
+		if A[k] then overlap = overlap + 1 end
+	end
+	return total > 0 and (2 * overlap) / total or 1
+end
+
+local function mkdir(path)
+	os.execute("mkdir -p " .. path)
+end
+
+local function update_spdx()
+	if not file_exists(NORMDIR) then
+		mkdir(NORMDIR)
+	end
+
+	print("[*] Downloading SPDX license list...")
+	local ok, _, code = os.execute(FETCH:format(TMP_LICENSE_LIST, LICENSE_LIST_URL))
+	if not ok or code ~= 0 then
+		print(colors.red .. "[!] Failed to download license list" .. colors.reset)
+		return
+	end
+
+	local json_text = read_file(TMP_LICENSE_LIST)
+	if not json_text then
+		print(colors.red .. "[!] Could not read downloaded SPDX license list" .. colors.reset)
+		return
+	end
+
+	local licenses_obj, err = parse_json_ucl(json_text)
+	if not licenses_obj or not licenses_obj.licenses then
+		print(colors.red .. "[!] Failed to parse SPDX license list: " .. (err or "unknown error") .. colors.reset)
+		return
+	end
+
+	for _, lic in ipairs(licenses_obj.licenses) do
+		local id = lic.licenseId
+		if not id then
+			dprint("[!] Skipping license entry with missing ID")
+		elseif lic.isDeprecatedLicenseId then
+			dprint("[-] Skipping deprecated license: " .. id)
+		else
+			local lic_tmp = TMPDIR .. "/" .. id .. ".json"
+			local outpath = NORMDIR .. "/" .. id .. ".txt"
+			local url = LICENSE_BASE_URL .. id .. ".json"
+
+			if file_exists(outpath) then
+				dprint("[=] Already exists: " .. id)
+			else
+				local ok2, _, code2 = os.execute(FETCH:format(lic_tmp, url))
+				if ok2 and code2 == 0 then
+					local raw = read_file(lic_tmp)
+					if raw then
+						local parsed, perr = parse_json_ucl(raw)
+						if parsed and parsed.licenseText then
+							local text = parsed.licenseText:gsub("\\n", "\n"):gsub('\\"', '"')
+							local normtext = normalize(text)
+							local outf = io.open(outpath, "w")
+							if outf then
+								outf:write(normtext)
+								outf:close()
+								print("[+] Fetching license: " .. id)
+							else
+								print("[!] Failed to write: " .. id)
+							end
+						else
+							print("[!] licenseText missing or invalid for: " .. id)
+						end
+						cleanup(lic_tmp)
+					end
+				else
+					print("[!] Failed to fetch: " .. id)
+				end
+			end
+		end
+	end
+end
+
+-- Save normalized input for inspection/debug
+local function save_normalized_input(input_path, normalized_text)
+	local dir = "normalized-input"
+	os.execute("mkdir -p " .. dir)
+
+	local input_basename = input_path:match("^.+/(.+)$") or input_path
+	local output_path = dir .. "/" .. input_basename .. ".normalized"
+
+	local f = io.open(output_path, "w")
+	if f then
+		f:write(normalized_text)
+		f:close()
+		print(colors.green .. "[*] Saved normalized input to: " .. output_path .. colors.reset)
+	else
+		print(colors.red .. "[!] Failed to save normalized input to: " .. output_path .. colors.reset)
+	end
+end
+
+-- Compare a LICENSE_FILE
+local function compare(file)
+	if not file_exists(file) then
+		print(colors.red .. "[!] LICENSE file not found: " .. file .. colors.reset)
+		os.exit(1)
+	end
+	local f = io.open(file, "r")
+	local raw = f:read("*a")
+	f:close()
+	local input = normalize(raw)
+	if debug then save_normalized_input(file, input) end
+
+	local results = {}
+	local top_score = 0
+
+	for entry in io.popen("ls " .. NORMDIR):lines() do
+		if entry:match("%.txt$") then
+			local lic_id = entry:gsub("%.txt$", "")
+			local path = NORMDIR .. "/" .. entry
+			local f = io.open(path, "r")
+			local spdx = f:read("*a")
+			f:close()
+			local score = dice(input, spdx)
+--			if score > top_score then
+--				top_score = score
+--				results = { { lic_id, score } }
+--			elseif math.abs(score - top_score) < 1e-6 then
+			table.insert(results, { lic_id, score })
+--			end
+		end
+	end
+
+--	table.sort(results, function(a, b) return a[1] < b[1] end)
+	table.sort(results, function(a, b) return a[2] > b[2] end)
+	print("\nTop SPDX license matches for: " .. file)
+	print(string.rep("-", 60))
+	local max_display = 10
+--	for _, m in ipairs(results) do
+--		print(string.format("%-30s Dice=%.4f", m[1], m[2]))
+--	end
+	for i = 1, math.min(max_display, #results) do
+		local lic_id, score = table.unpack(results[i])
+		print(string.format("%-30s Dice=%.4f", lic_id, score))
+	end
+	print(string.rep("-", 60))
+	print(colors.red .. "[!] This SPDX checker is a helper. Manual verification is still required." .. colors.reset)
+	print(colors.red .. "    Read the LICENSE_FILE and matched SPDX license for due diligence." .. colors.reset)
+end
+
+-- SPDX scan function: finds license files or SPDX headers in source code
+local function scan_wrksrc(wrksrc)
+	local found = false
+
+	local license_patterns = {
+		"*LICEN[CS]E*", "*COPYING*", "COPYRIGHT",
+		"NOTICE", "UNLICENSE", "PATENTS", "LEGAL", "AUTHORS",
+		".*-license.*", ".*license.*", ".*licen[cs]e.*", "*licen[cs]e.*",
+	}
+
+	print(colors.yellow .. "[*] Scanning for known license files..." .. colors.reset)
+	for _, pattern in ipairs(license_patterns) do
+		local cmd = string.format("find %s -type f -iname %q", wrksrc, pattern)
+		local pipe = io.popen(cmd)
+		if pipe then
+			for line in pipe:lines() do
+				found = true
+				print(colors.green .. string.format("[+] Found license file: %s", line) .. colors.reset)
+				print(string.format("    To check SPDX match: %s/check_spdx.lua -f '%s'", scriptsdir, line))
+			end
+			pipe:close()
+		end
+	end
+
+	if not found then
+		print(colors.red .. "[-] No license files found. Scanning source files for SPDX headers...\n" .. colors.reset)
+		local scan_cmd = string.format("find %s -type f", wrksrc)
+		local pipe = io.popen(scan_cmd)
+		if pipe then
+			for file in pipe:lines() do
+				local f = io.open(file, "r")
+				if f then
+					for line in f:lines() do
+						if line:match("[Ss][Pp][Dd][Xx]%s*%-?License%-Identifier") then
+							print(string.format(colors.green .. "[+] Found SPDX header in: %s", file) .. colors.reset)
+							print(string.format("    Line: %s", line))
+							found = true
+							break
+						end
+					end
+					f:close()
+				end
+			end
+			pipe:close()
+		end
+		if not found then
+			print(colors.red .. "[-] No SPDX-License-Identifier headers found either." .. colors.reset)
+		end
+	end
+end
+-- Entrypoint
+local i = 1
+while i <= #args do
+	if args[i] == "-h" then
+		usage()
+		os.exit(0)
+	elseif args[i] == "-d" then
+		debug = true
+		i = i + 1
+	elseif args[i] == "-f" then
+		i = i + 1
+		if not args[i] then
+			print(colors.red .. "[-] Missing argument after -f" .. colors.reset)
+			os.exit(1)
+		end
+		license_file = args[i]
+		i = i + 1
+	elseif args[i] == "-s" then
+		scan_tree = true
+		i = i + 1
+		if not args[i] then
+			print(colors.red .. "[-] Missing argument after -s" .. colors.reset)
+			os.exit(1)
+		end
+		wrksrc = args[i]
+		i = i + 1
+	else
+		print(colors.red .. "[-] Unknown argument: " .. args[i] .. colors.reset)
+		usage()
+		os.exit(1)
+	end
+end
+
+if not file_exists(NORMDIR) or not file_exists(TIMESTAMP) or is_stale(TIMESTAMP, DAYS_VALID) then
+	update_spdx()
+end
+
+if license_file then
+	dprint("Analyzing LICENSE file: " .. license_file)
+	compare(license_file)
+end
+
+if scan_tree then
+	if not wrksrc then
+		print(colors.red .. "[-] WRKSRC does not exist" .. colors.reset)
+		os.exit(1)
+	end
+	scan_wrksrc(wrksrc)
+end
diff --git a/Mk/bsd.licenses.mk b/Mk/bsd.licenses.mk
--- a/Mk/bsd.licenses.mk
+++ b/Mk/bsd.licenses.mk
@@ -332,6 +332,7 @@
 .            endif
 .          else
 _LICENSE_FILE_${lic}=	${LICENSE_FILE_${lic}}
+_LICENSE_FILE_FOUND=	yes
 .          endif
 
 .        else
@@ -622,6 +623,34 @@
 		@${ECHO_MSG} "===>  License ${_LICENSE} needs confirmation, will ask later"
 .    endif
 
+# Check and try to match possible license names from SPDX
+check-spdx-license: extract
+.    if !exists(/usr/lib/flua/ucl.so) && !exists(${LOCALBASE}/lib/lua/5.4/ucl.so)
+	@${ECHO_MSG} "===>  Lua UCL library not found, cannot check SPDX license match."
+	@${ECHO_MSG} "===>  Please install textproc/libucl ports."
+.    else
+.      if defined(LICENSE_FILE) && defined(LICENSE_COMB) && ${LICENSE_COMB} != "single"
+	@${ECHO_MSG} "Cannot match SPDX license from combined license file ${LICENSE_FILE}"
+.      elif defined(LICENSE_FILE)
+	@${ECHO_MSG} "==> Checking SPDX match for: ${_LICENSE_FILE}"
+	@${SETENV} SCRIPTSDIR=${SCRIPTSDIR} ${SCRIPTSDIR}/check_spdx.lua -f ${LICENSE_FILE}
+.      elif defined(LICENSE)
+.        for lic in ${LICENSE:O:u}
+.          if defined(LICENSE_FILE_${lic})
+		@echo "==> Checking SPDX match for: ${LICENSE_FILE_${lic}}"
+		@${SETENV} SCRIPTSDIR=${SCRIPTSDIR} ${SCRIPTSDIR}/check_spdx.lua -f ${LICENSE_FILE_${lic}}
+.          endif
+.        endfor
+.        if !defined(LICENSE_FILE_FOUND)
+	@${ECHO_MSG} "==> No LICENSE_FILE_<LICENSE> defined. Falling back to source scan."
+	@${SETENV} SCRIPTSDIR=${SCRIPTSDIR} ${SCRIPTSDIR}/check_spdx.lua -s ${WRKSRC}
+.        endif
+.      else
+	@${ECHO_MSG} "==> No LICENSE or LICENSE_FILE defined. Running source scan."
+	@${SETENV} SCRIPTSDIR=${SCRIPTSDIR} ${SCRIPTSDIR}/check_spdx.lua -s ${WRKSRC}
+.      endif
+.    endif
+
 # Display, ask and save preference if requested
 
 ask-license: ${_LICENSE_COOKIE}