Further wiki slug normalization

internal/topdata/wiki_deploy_test.go

@@ -175,6 +175,8 @@ func TestDeploySlugifyWikiTitleMatchesGeneratedSlugPolicy(t *testing.T) {
 		`Hardiness vs. Enchantments`:                     "hardiness-vs-enchantments",
 		`Clairaudience/Clairvoyance`:                     "clairaudience-clairvoyance",
 		`Élite & Noble Houses`:                       "elite-noble-houses",
+		`Alpha!@#$%^&*()[]-=_+/?.,<>` + "`" + `~|\Omega`: "alpha-omega",
+		`Æther Œuvre Øresund Straße Þorn Łódź Đelta`:     "aether-oeuvre-oresund-strasse-thorn-lodz-delta",
 	}
 	for input, want := range tests {
 		if got := slugifyWikiTitle(input); got != want {

internal/topdata/wiki_native_test.go

@@ -1250,6 +1250,8 @@ func TestWikiSlugifyTitleNormalizesPunctuationAndSeparators(t *testing.T) {
 		`Élite & Noble Houses`:                       "elite-noble-houses",
 		`Rock 'n' Roll`:                                  "rock-n-roll",
 		`Melf's Acid Arrow`:                          "melfs-acid-arrow",
+		`Alpha!@#$%^&*()[]-=_+/?.,<>` + "`" + `~|\Omega`: "alpha-omega",
+		`Æther Œuvre Øresund Straße Þorn Łódź Đelta`:     "aether-oeuvre-oresund-strasse-thorn-lodz-delta",
 	}
 	for input, want := range tests {
 		if got := wikiSlugifyTitle(input); got != want {

internal/topdata/wiki_slug.go

@@ -13,6 +13,7 @@ func slugifyWikiText(value string, fallback string) string {
 	var b strings.Builder
 	lastDash := false
 	for _, r := range norm.NFKD.String(strings.ToLower(value)) {
+		transliterated := transliterateWikiSlugRune(r)
 		switch {
 		case r >= 'a' && r <= 'z':
 			b.WriteRune(r)
@@ -24,6 +25,9 @@ func slugifyWikiText(value string, fallback string) string {
 			continue
 		case isWikiSlugJoinerPunctuation(r):
 			continue
+		case transliterated != "":
+			b.WriteString(transliterated)
+			lastDash = false
 		default:
 			if b.Len() > 0 && !lastDash {
 				b.WriteByte('-')
@@ -46,3 +50,32 @@ func isWikiSlugJoinerPunctuation(r rune) bool {
 		return false
 	}
 }
+
+func transliterateWikiSlugRune(r rune) string {
+	switch r {
+	case 'æ':
+		return "ae"
+	case 'œ':
+		return "oe"
+	case 'ø':
+		return "o"
+	case 'ß':
+		return "ss"
+	case 'þ':
+		return "th"
+	case 'ð', 'đ':
+		return "d"
+	case 'ł':
+		return "l"
+	case 'ħ':
+		return "h"
+	case 'ı':
+		return "i"
+	case 'ŋ':
+		return "n"
+	case 'ŧ':
+		return "t"
+	default:
+		return ""
+	}
+}