diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index 9f6c995..c99a682 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -20,7 +20,7 @@ community include:
 * Demonstrating empathy and kindness toward other people
 * Being respectful of differing opinions, viewpoints, and experiences
 * Giving and gracefully accepting constructive feedback
-* Accepting responsibility and apologizing to those affected by our mistakes,
+* Accepting responsibility and apologizing to those affected by our errors,
   and learning from the experience
 * Focusing on what is best not just for us as individuals, but for the
   overall community
diff --git a/README.md b/README.md
index 78360bc..8fe9c09 100644
--- a/README.md
+++ b/README.md
@@ -37,9 +37,9 @@ type Person struct {
 
 person := &Person{}
 
-mistakes, valid := checker.Check(person)
+errors, valid := checker.Check(person)
 if !valid {
-    // Send the mistakes back to the user
+    // Send the errors back to the user
 }
 ```
 
@@ -333,7 +333,7 @@ import (
 func main() {
 	err := checker.IsASCII("Checker")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -365,7 +365,7 @@ import (
 func main() {
 	err := checker.IsAlphanumeric("ABcd1234")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -398,7 +398,7 @@ func main() {
 	err := checker.IsAmexCreditCard("378282246310005")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -431,7 +431,7 @@ func main() {
 	err := checker.IsAnyCreditCard("6011111111111117")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -463,7 +463,7 @@ import (
 func main() {
 	err := checker.IsCidr("2001:db8::/32")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -495,7 +495,7 @@ import (
 func main() {
 	err := checker.IsDigits("1234")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -528,7 +528,7 @@ func main() {
 	err := checker.IsDinersCreditCard("36227206271667")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -561,7 +561,7 @@ func main() {
 	err := checker.IsDiscoverCreditCard("6011111111111117")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -593,7 +593,7 @@ import (
 func main() {
 	err := checker.IsEmail("user@zdo.com")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -625,7 +625,7 @@ import (
 func main() {
 	err := checker.IsFqdn("zdo.com")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -657,7 +657,7 @@ import (
 func main() {
 	err := checker.IsIP("2001:db8::68")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -689,7 +689,7 @@ import (
 func main() {
 	err := checker.IsIPV4("192.168.1.1")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -722,7 +722,7 @@ func main() {
 	err := checker.IsIPV6("2001:db8::68")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -754,7 +754,7 @@ import (
 func main() {
 	err := checker.IsISBN("1430248270")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -786,7 +786,7 @@ import (
 func main() {
 	err := checker.IsISBN10("1430248270")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -818,7 +818,7 @@ import (
 func main() {
 	err := checker.IsISBN13("9781430248279")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -851,7 +851,7 @@ func main() {
 	err := checker.IsJcbCreditCard("3530111333300000")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -883,7 +883,7 @@ import (
 func main() {
 	err := checker.IsLuhn("4012888888881881")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -915,7 +915,7 @@ import (
 func main() {
 	err := checker.IsMac("00:00:5e:00:53:01")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -948,7 +948,7 @@ func main() {
 	err := checker.IsMasterCardCreditCard("5555555555554444")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -982,7 +982,7 @@ func main() {
 
 	err := checker.IsMax(quantity, 10)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -1016,7 +1016,7 @@ func main() {
 
 	err := checker.IsMaxLength(s, 4)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -1050,7 +1050,7 @@ func main() {
 
 	err := checker.IsMin(age, 21)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -1084,7 +1084,7 @@ func main() {
 
 	err := checker.IsMinLength(s, 4)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -1150,7 +1150,7 @@ import (
 func main() {
 	err := checker.IsURL("https://zdo.com")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -1183,7 +1183,7 @@ func main() {
 	err := checker.IsUnionPayCreditCard("6200000000000005")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
@@ -1216,7 +1216,7 @@ func main() {
 	err := checker.IsVisaCreditCard("4111111111111111")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 ```
diff --git a/alphanumeric_test.go b/alphanumeric_test.go
index 4fe9661..e94768c 100644
--- a/alphanumeric_test.go
+++ b/alphanumeric_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsAlphanumeric() {
 	err := checker.IsAlphanumeric("ABcd1234")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/ascii_test.go b/ascii_test.go
index 8685362..238f60b 100644
--- a/ascii_test.go
+++ b/ascii_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsASCII() {
 	err := checker.IsASCII("Checker")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/checker.go b/checker.go
index 595649c..b5ef498 100644
--- a/checker.go
+++ b/checker.go
@@ -75,7 +75,7 @@ func Check(s interface{}) (Errors, bool) {
 		panic("expecting struct")
 	}
 
-	errors := Errors{}
+	errs := Errors{}
 
 	jobs := []checkerJob{
 		{
@@ -118,14 +118,14 @@ func Check(s interface{}) (Errors, bool) {
 		} else {
 			for _, checker := range initCheckers(job.Config) {
 				if err := checker(job.Value, job.Parent); err != nil {
-					errors[job.Name] = err
+					errs[job.Name] = err
 					break
 				}
 			}
 		}
 	}
 
-	return errors, len(errors) == 0
+	return errs, len(errs) == 0
 }
 
 // initCheckers initializes the checkers provided in the config.
diff --git a/checker_test.go b/checker_test.go
index 723a9e6..540bca5 100644
--- a/checker_test.go
+++ b/checker_test.go
@@ -60,16 +60,16 @@ func TestCheckInvalid(t *testing.T) {
 
 	person := &Person{}
 
-	mistakes, valid := Check(person)
+	errors, valid := Check(person)
 	if valid {
 		t.Fail()
 	}
 
-	if len(mistakes) != 1 {
+	if len(errors) != 1 {
 		t.Fail()
 	}
 
-	if mistakes["Name"] != ErrRequired {
+	if errors["Name"] != ErrRequired {
 		t.Fail()
 	}
 }
@@ -83,12 +83,12 @@ func TestCheckValid(t *testing.T) {
 		Name: "Onur",
 	}
 
-	mistakes, valid := Check(person)
+	errors, valid := Check(person)
 	if !valid {
 		t.Fail()
 	}
 
-	if len(mistakes) != 0 {
+	if len(errors) != 0 {
 		t.Fail()
 	}
 }
@@ -112,20 +112,20 @@ func TestCheckNestedStruct(t *testing.T) {
 
 	person := &Person{}
 
-	mistakes, valid := Check(person)
+	errors, valid := Check(person)
 	if valid {
 		t.Fail()
 	}
 
-	if len(mistakes) != 2 {
+	if len(errors) != 2 {
 		t.Fail()
 	}
 
-	if mistakes["Name"] != ErrRequired {
+	if errors["Name"] != ErrRequired {
 		t.Fail()
 	}
 
-	if mistakes["Home.Street"] != ErrRequired {
+	if errors["Home.Street"] != ErrRequired {
 		t.Fail()
 	}
 }
diff --git a/cidr_test.go b/cidr_test.go
index 2dd1e38..2d7852d 100644
--- a/cidr_test.go
+++ b/cidr_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsCidr() {
 	err := checker.IsCidr("2001:db8::/32")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/credit_card_test.go b/credit_card_test.go
index f1905e8..fc81997 100644
--- a/credit_card_test.go
+++ b/credit_card_test.go
@@ -38,7 +38,7 @@ func ExampleIsAnyCreditCard() {
 	err := checker.IsAnyCreditCard("6011111111111117")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
@@ -64,7 +64,7 @@ func ExampleIsAmexCreditCard() {
 	err := checker.IsAmexCreditCard("378282246310005")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
@@ -90,7 +90,7 @@ func ExampleIsDinersCreditCard() {
 	err := checker.IsDinersCreditCard("36227206271667")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 func TestIsDinersCreditCardValid(t *testing.T) {
@@ -115,7 +115,7 @@ func ExampleIsDiscoverCreditCard() {
 	err := checker.IsDiscoverCreditCard("6011111111111117")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 func TestIsDiscoverCreditCardValid(t *testing.T) {
@@ -140,7 +140,7 @@ func ExampleIsJcbCreditCard() {
 	err := checker.IsJcbCreditCard("3530111333300000")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
@@ -166,7 +166,7 @@ func ExampleIsMasterCardCreditCard() {
 	err := checker.IsMasterCardCreditCard("5555555555554444")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
@@ -192,7 +192,7 @@ func ExampleIsUnionPayCreditCard() {
 	err := checker.IsUnionPayCreditCard("6200000000000005")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
@@ -218,7 +218,7 @@ func ExampleIsVisaCreditCard() {
 	err := checker.IsVisaCreditCard("4111111111111111")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 func TestIsVisaCreditCardValid(t *testing.T) {
diff --git a/digits_test.go b/digits_test.go
index 86830c1..4246713 100644
--- a/digits_test.go
+++ b/digits_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsDigits() {
 	err := checker.IsDigits("1234")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/email_test.go b/email_test.go
index 862e2ef..c200ed0 100644
--- a/email_test.go
+++ b/email_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsEmail() {
 	err := checker.IsEmail("user@zdo.com")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/fqdn_test.go b/fqdn_test.go
index 82edbfd..0a8d76e 100644
--- a/fqdn_test.go
+++ b/fqdn_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsFqdn() {
 	err := checker.IsFqdn("zdo.com")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/ip_test.go b/ip_test.go
index 4995d8f..a9dd74d 100644
--- a/ip_test.go
+++ b/ip_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsIP() {
 	err := checker.IsIP("2001:db8::68")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/ipv4_test.go b/ipv4_test.go
index fba513d..1e2509c 100644
--- a/ipv4_test.go
+++ b/ipv4_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsIPV4() {
 	err := checker.IsIPV4("192.168.1.1")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/ipv6_test.go b/ipv6_test.go
index c8d8d4e..97be750 100644
--- a/ipv6_test.go
+++ b/ipv6_test.go
@@ -15,7 +15,7 @@ func ExampleIsIPV6() {
 	err := checker.IsIPV6("2001:db8::68")
 
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/isbn_test.go b/isbn_test.go
index f173981..8d12e60 100644
--- a/isbn_test.go
+++ b/isbn_test.go
@@ -15,7 +15,7 @@ import (
 func ExampleIsISBN10() {
 	err := checker.IsISBN10("1430248270")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
@@ -57,7 +57,7 @@ func TestIsISBN10InvalidCheck(t *testing.T) {
 func ExampleIsISBN13() {
 	err := checker.IsISBN13("9781430248279")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
@@ -92,7 +92,7 @@ func TestIsISBN13InvalidCheck(t *testing.T) {
 func ExampleIsISBN() {
 	err := checker.IsISBN("1430248270")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/luhn_test.go b/luhn_test.go
index e193621..3ddb5e1 100644
--- a/luhn_test.go
+++ b/luhn_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsLuhn() {
 	err := checker.IsLuhn("4012888888881881")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/mac_test.go b/mac_test.go
index e966765..7e8ba63 100644
--- a/mac_test.go
+++ b/mac_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsMac() {
 	err := checker.IsMac("00:00:5e:00:53:01")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/max_test.go b/max_test.go
index c6f3adf..6f5ce65 100644
--- a/max_test.go
+++ b/max_test.go
@@ -16,7 +16,7 @@ func ExampleIsMax() {
 
 	err := checker.IsMax(quantity, 10)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/maxlength_test.go b/maxlength_test.go
index e2e6d3b..cb9b395 100644
--- a/maxlength_test.go
+++ b/maxlength_test.go
@@ -16,7 +16,7 @@ func ExampleIsMaxLength() {
 
 	err := checker.IsMaxLength(s, 4)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/min_test.go b/min_test.go
index 40efbe7..dc12888 100644
--- a/min_test.go
+++ b/min_test.go
@@ -16,7 +16,7 @@ func ExampleIsMin() {
 
 	err := checker.IsMin(age, 21)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/minlength_test.go b/minlength_test.go
index 045e958..bac0898 100644
--- a/minlength_test.go
+++ b/minlength_test.go
@@ -16,7 +16,7 @@ func ExampleIsMinLength() {
 
 	err := checker.IsMinLength(s, 4)
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }
 
diff --git a/url_test.go b/url_test.go
index 883eb0a..ed5334e 100644
--- a/url_test.go
+++ b/url_test.go
@@ -14,7 +14,7 @@ import (
 func ExampleIsURL() {
 	err := checker.IsURL("https://zdo.com")
 	if err != nil {
-		// Send the mistakes back to the user
+		// Send the errors back to the user
 	}
 }