diff --git a/languages_substitution.go b/languages_substitution.go
index d11436f..7661d6a 100644
--- a/languages_substitution.go
+++ b/languages_substitution.go
@@ -26,6 +26,7 @@ func init() {
 		&nlSub,
 		&nnSub,
 		&plSub,
+		&ptSub,
 		&roSub,
 		&slSub,
 		&svSub,
@@ -190,6 +191,20 @@ var plSub = map[rune]string{
 var ptSub = map[rune]string{
 	'&': "e",
 	'@': "em",
+	'á': "a",
+	'Á': "A",
+	'é': "e",
+	'É': "E",
+	'í': "i",
+	'Í': "I",
+	'ó': "o",
+	'Ó': "O",
+	'ö': "o",
+	'Ö': "O",
+	'ú': "u",
+	'Ú': "U",
+	'ü': "u",
+	'Ü': "U",
 }
 
 var roSub = map[rune]string{
diff --git a/slug.go b/slug.go
index 4786aa5..7d9c13a 100644
--- a/slug.go
+++ b/slug.go
@@ -99,7 +99,7 @@ func MakeLang(s string, lang string) (slug string) {
 		slug = SubstituteRune(slug, nnSub)
 	case "pl", "pol":
 		slug = SubstituteRune(slug, plSub)
-	case "pt", "prt", "pt-br", "bra", "por":
+	case "pt", "prt", "pt-br", "br", "bra", "por":
 		slug = SubstituteRune(slug, ptSub)
 	case "ro", "rou":
 		slug = SubstituteRune(slug, roSub)
diff --git a/slug_test.go b/slug_test.go
index 18f18b2..6e39901 100644
--- a/slug_test.go
+++ b/slug_test.go
@@ -96,6 +96,7 @@ func TestSlugMakeLang(t *testing.T) {
 		{"hu", "SzÉlÜtÖtt ŰrÚjsÁgírÓnŐ", "SzElUtOtt-UrUjsAgirOnO", false},
 		{"kk", "әғһіңөқұүӘҒҺІҢӨҚҰҮ", "aghinoquuaghinoquu", true},
 		{"kk", "әғһіңөқұүӘҒҺІҢӨҚҰҮ", "aghinoquuAGHINOQUU", false},
+		{"pt", "áÁéÉíÍóÓöÖúÚüÜ", "aAeEiIoOoOuUuU", false},
 		{"ro", "ĂăÂăÎîȘșȚț", "aaaaiisstt", true},
 		{"ro", "ĂăÂăÎîȘșȚț", "AaAaIiSsTt", false},
 		{"tr", "şüöğıçŞÜÖİĞÇ", "suogicsuoigc", true},