diff --git a/client/src/cmdhfmf.c b/client/src/cmdhfmf.c
index 53a765594..9ae38b4eb 100644
--- a/client/src/cmdhfmf.c
+++ b/client/src/cmdhfmf.c
@@ -5275,7 +5275,7 @@ static int CmdHF14AMfMAD(const char *Cmd) {
 
     bool got_first = true;
     if (mfReadSector(MF_MAD1_SECTOR, MF_KEY_A, (uint8_t *)g_mifare_mad_key, sector0) != PM3_SUCCESS) {
-        PrintAndLogEx(WARNING, "error, read sector 0. card don't have MAD or don't have MAD on default keys");
+        PrintAndLogEx(WARNING, "error, read sector 0. card doesn't have MAD or doesn't have MAD on default keys");
         got_first = false;
     } else {
         PrintAndLogEx(INFO, "Authentication ( " _GREEN_("OK") " )");
@@ -5285,7 +5285,7 @@ static int CmdHF14AMfMAD(const char *Cmd) {
     if (got_first == false && keylen == 6) {
         PrintAndLogEx(INFO, "Trying user specified key...");
         if (mfReadSector(MF_MAD1_SECTOR, MF_KEY_A, userkey, sector0) != PM3_SUCCESS) {
-            PrintAndLogEx(ERR, "error, read sector 0. card don't have MAD or don't the custom key is wrong");
+            PrintAndLogEx(ERR, "error, read sector 0. card doesn't have MAD or the custom key is wrong");
         } else {
             PrintAndLogEx(INFO, "Authentication ( " _GREEN_("OK") " )");
             got_first = true;
@@ -5306,7 +5306,7 @@ static int CmdHF14AMfMAD(const char *Cmd) {
 
     if (haveMAD2) {
         if (mfReadSector(MF_MAD2_SECTOR, MF_KEY_A, (uint8_t *)g_mifare_mad_key, sector10)) {
-            PrintAndLogEx(ERR, "error, read sector 0x10. card don't have MAD or don't have MAD on default keys");
+            PrintAndLogEx(ERR, "error, read sector 0x10. card doesn't have MAD or doesn't have MAD on default keys");
             return PM3_ESOFT;
         }
 
@@ -5450,7 +5450,7 @@ int CmdHFMFNDEFRead(const char *Cmd) {
         PrintAndLogEx(INFO, "reading MAD v1 sector");
 
     if (mfReadSector(MF_MAD1_SECTOR, MF_KEY_A, (uint8_t *)g_mifare_mad_key, sector0)) {
-        PrintAndLogEx(ERR, "error, read sector 0. card don't have MAD or don't have MAD on default keys");
+        PrintAndLogEx(ERR, "error, read sector 0. card doesn't have MAD or doesn't have MAD on default keys");
         PrintAndLogEx(HINT, "Try " _YELLOW_("`hf mf ndefread -k `") " with your custom key");
         return PM3_ESOFT;
     }
@@ -5467,7 +5467,7 @@ int CmdHFMFNDEFRead(const char *Cmd) {
             PrintAndLogEx(INFO, "reading MAD v2 sector");
 
         if (mfReadSector(MF_MAD2_SECTOR, MF_KEY_A, (uint8_t *)g_mifare_mad_key, sector10)) {
-            PrintAndLogEx(ERR, "error, read sector 0x10. card don't have MAD or don't have MAD on default keys");
+            PrintAndLogEx(ERR, "error, read sector 0x10. card doesn't have MAD or doesn't have MAD on default keys");
             PrintAndLogEx(HINT, "Try " _YELLOW_("`hf mf ndefread -k `") " with your custom key");
             return PM3_ESOFT;
         }
diff --git a/client/src/cmdhfmfp.c b/client/src/cmdhfmfp.c
index 01a59830c..89584260a 100644
--- a/client/src/cmdhfmfp.c
+++ b/client/src/cmdhfmfp.c
@@ -1360,7 +1360,7 @@ static int CmdHFMFPMAD(const char *Cmd) {
 
     if (mfpReadSector(MF_MAD1_SECTOR, MF_KEY_A, (uint8_t *)g_mifarep_mad_key, sector0, verbose)) {
         PrintAndLogEx(NORMAL, "");
-        PrintAndLogEx(ERR, "error, read sector 0. card don't have MAD or don't have MAD on default keys");
+        PrintAndLogEx(ERR, "error, read sector 0. card doesn't have MAD or doesn't have MAD on default keys");
         return 2;
     }
 
@@ -1380,7 +1380,7 @@ static int CmdHFMFPMAD(const char *Cmd) {
     if (haveMAD2) {
         if (mfpReadSector(MF_MAD2_SECTOR, MF_KEY_A, (uint8_t *)g_mifarep_mad_key, sector10, verbose)) {
             PrintAndLogEx(NORMAL, "");
-            PrintAndLogEx(ERR, "error, read sector 0x10. card don't have MAD or don't have MAD on default keys");
+            PrintAndLogEx(ERR, "error, read sector 0x10. card doesn't have MAD or doesn't have MAD on default keys");
             return 2;
         }
 
@@ -1514,7 +1514,7 @@ int CmdHFMFPNDEFRead(const char *Cmd) {
         PrintAndLogEx(INFO, "reading MAD v1 sector");
 
     if (mfpReadSector(MF_MAD1_SECTOR, MF_KEY_A, (uint8_t *)g_mifarep_mad_key, sector0, verbose)) {
-        PrintAndLogEx(ERR, "error, read sector 0. card don't have MAD or don't have MAD on default keys");
+        PrintAndLogEx(ERR, "error, read sector 0. card doesn't have MAD or doesn't have MAD on default keys");
         PrintAndLogEx(HINT, "Try " _YELLOW_("`hf mfp ndefread -k `") " with your custom key");
         return PM3_ESOFT;
     }
@@ -1532,7 +1532,7 @@ int CmdHFMFPNDEFRead(const char *Cmd) {
             PrintAndLogEx(INFO, "reading MAD v2 sector");
 
         if (mfpReadSector(MF_MAD2_SECTOR, MF_KEY_A, (uint8_t *)g_mifarep_mad_key, sector10, verbose)) {
-            PrintAndLogEx(ERR, "error, read sector 0x10. card don't have MAD or don't have MAD on default keys");
+            PrintAndLogEx(ERR, "error, read sector 0x10. card doesn't have MAD or doesn't have MAD on default keys");
             PrintAndLogEx(HINT, "Try " _YELLOW_("`hf mfp ndefread -k `") " with your custom key");
             return PM3_ESOFT;
         }