diff --git a/src/get_bank_name_by_card_number/errors.rs b/src/get_bank_name_by_card_number/errors.rs
index 4e97188..9fd21d5 100644
--- a/src/get_bank_name_by_card_number/errors.rs
+++ b/src/get_bank_name_by_card_number/errors.rs
@@ -3,9 +3,9 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Clone, PartialEq, Eq, Debug, Hash)]
 pub enum BankNameByCardNumberError {
-    #[error("card number: {0:?} with length of {1:?} is too short minimum is 6")]
+    #[error("Card number \"{0:?}\" with a length of {1:?} is too short; minimum length is 6.")]
     TooShort(String, usize),
 
-    #[error("card number {0:?} does not match any bank")]
+    #[error("Card number {0:?} does not match any bank.")]
     NotFound(String),
 }
diff --git a/src/get_place_by_iran_national_id/errors.rs b/src/get_place_by_iran_national_id/errors.rs
index 3b0c25b..8a7fcf5 100644
--- a/src/get_place_by_iran_national_id/errors.rs
+++ b/src/get_place_by_iran_national_id/errors.rs
@@ -3,9 +3,9 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Debug, PartialEq, Eq, Clone, Copy, Hash)]
 pub enum PlaceByNationalIdError {
-    #[error("national id is too short len:{0}")]
+    #[error("National ID is too short. Length: {0}")]
     TooShortNationalId(usize),
 
-    #[error("place not found")]
+    #[error("Place not found for the given National ID.")]
     NotFound,
 }
diff --git a/src/legal_id/errors.rs b/src/legal_id/errors.rs
index 37f59d6..63a5981 100644
--- a/src/legal_id/errors.rs
+++ b/src/legal_id/errors.rs
@@ -3,18 +3,18 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Debug, PartialEq, Eq, Clone, Copy, Hash)]
 pub enum VerifyLegalIdError {
-    #[error("invalid len legal id should be 11 chars")]
+    #[error("Invalid length. Legal ID should be exactly 11 characters.")]
     InvalidLength,
 
-    #[error("invalid digit")]
+    #[error("There is an invalid digit in the input.")]
     InvalidDigit,
 
-    #[error("invalid legal id")]
+    #[error("Legal ID is invalid.")]
     Invalid,
 
-    #[error("invalid legal id")]
+    #[error("Input checksum is invalid.")]
     InvalidChecksum,
 
-    #[error("you should not see this error. make a issue on our github please.")]
+    #[error("You should not see this! Please create an issue on our GitHub repository.")]
     InternalError,
 }
diff --git a/src/number_plate/errors.rs b/src/number_plate/errors.rs
index 97b0625..3f150ed 100644
--- a/src/number_plate/errors.rs
+++ b/src/number_plate/errors.rs
@@ -3,14 +3,14 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Debug, PartialEq, Eq, Clone, Hash)]
 pub enum PlateNumberError {
-    #[error("plate numbers must be 7 or 8 digits long")]
+    #[error("Plate numbers must be 7 or 8 digits long.")]
     InvalidPlateDigitLength,
-    #[error("invalid plate char length (7 for motorcycles, 8 for cars)")]
+    #[error("Invalid plate character length. Motorcycles should have 7 characters, and cars should have 8.")]
     InvalidPlateCharacterLength,
-    #[error("invalid plate char {0:?}")]
+    #[error("Invalid plate character: {0}")]
     InvalidPlateCharacter(String),
-    #[error("invalid motorcycle province code {0:?}")]
+    #[error("Invalid motorcycle province code: {0:?}")]
     MotorcycleProvinceNotFound(String),
-    #[error("invalid car province code {0:?}")]
+    #[error("Invalid car province code: {0:?}")]
     CarProvinceNotFound(String),
 }
diff --git a/src/number_to_words/error.rs b/src/number_to_words/error.rs
index 50aba1f..43fa83b 100644
--- a/src/number_to_words/error.rs
+++ b/src/number_to_words/error.rs
@@ -3,18 +3,18 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Clone, Debug, Hash, PartialEq, Eq)]
 pub enum NumberToWordsError {
-    #[error("number_to_words_str input is empty")]
+    #[error("The input is empty.")]
     EmptyString,
 
-    #[error("number_to_words_str invalid integer -> \"{0}\"")]
+    #[error("There is an invalid integer in the input: \"{0}\"")]
     InvalidInteger(String),
 
-    #[error("number_to_words_str integer overflow -> \"{0}\"")]
+    #[error("Overflow occurred while processing the integer: \"{0}\"")]
     Overflow(String),
 
-    #[error("number_to_words_str unknown -> \"{0}\"")]
+    #[error("Unknown error occurred: \"{0}\"")]
     Unknown(String),
 
-    #[error("number_to_words_str you should not see this error, please make an issue on github")]
+    #[error("You should not see this! Please create an issue on our GitHub repository.")]
     Internal,
 }
diff --git a/src/sheba/errors.rs b/src/sheba/errors.rs
index 677e908..8e179d7 100644
--- a/src/sheba/errors.rs
+++ b/src/sheba/errors.rs
@@ -5,25 +5,25 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Clone, Copy, Debug, Hash, PartialEq, Eq)]
 pub enum ShebaValidationError {
-    #[error("empty")]
+    #[error("The input is empty.")]
     Empty,
 
-    #[error("not started with IR")]
+    #[error("The input does not start with 'IR'.")]
     NotStartedWithIR,
 
-    #[error("invalid digit")]
+    #[error("There is an invalid digit in the input.")]
     InvalidDigit,
 
-    #[error("invalid length: {0:?}")]
+    #[error("Input length is invalid: {0:?}")]
     InvalidLength(usize),
 
-    #[error("invalid checksum")]
+    #[error("Input checksum is invalid.")]
     InvalidChecksum,
 
-    #[error("bank not found")]
+    #[error("Bank information not found.")]
     BankNotFound,
 
-    #[error("you should not see this! please make a issue on our github")]
+    #[error("You should not see this! Please create an issue on our GitHub repository.")]
     InternalError,
 }
 
diff --git a/src/verity_card_number/errors.rs b/src/verity_card_number/errors.rs
index 246726c..d92eb95 100644
--- a/src/verity_card_number/errors.rs
+++ b/src/verity_card_number/errors.rs
@@ -5,13 +5,13 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Debug, PartialEq, Eq)]
 pub enum VerifyCardNumberError {
-    #[error("invalid digit")]
+    #[error("There is an invalid digit in the input.")]
     InvalidDigit,
 
-    #[error("invalid length")]
+    #[error("Input length is invalid.")]
     InvalidLength,
 
-    #[error("invalid length")]
+    #[error("Input format is not a valid card number.")]
     InvalidCardNumber,
 }
 
diff --git a/src/words_to_number/errors.rs b/src/words_to_number/errors.rs
index 2c54060..6361080 100644
--- a/src/words_to_number/errors.rs
+++ b/src/words_to_number/errors.rs
@@ -3,8 +3,8 @@ use thiserror::Error;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[derive(Error, Clone, Copy, Debug, Hash, PartialEq, Eq)]
 pub enum WordsToNumberError {
-    #[error("There is a invalid unit in the input")]
+    #[error("There is an invalid unit in the input.")]
     InvalidUnit,
-    #[error("The input cannot be a empty string")]
+    #[error("The input cannot be an empty string.")]
     EmptyInput,
 }