diff --git a/docs/i18n_languages.md b/docs/i18n_languages.md
index 00fe1c8..90330ca 100644
--- a/docs/i18n_languages.md
+++ b/docs/i18n_languages.md
@@ -25,9 +25,9 @@ Translation in GUI:
 These are the current namespaces, in which all translations are organized:
 
 - `auth`: relative to the authentication (name, addresses, keys, secrets, seedphrase, and so on...)
-- `core`: all the core translation (the most part)
+- `core`: all the core translation
 - `group`: all translations concerning group management
-- `tutorial`: this is dedicated to the tutorial pages
+- `tutorial`: dedicated to the tutorial pages
 
 Please avoid duplication of the same translation.
 In the same page the usage of translations from different namespaces is permissible.
diff --git a/src/App.tsx b/src/App.tsx
index feb0d66..2c0e0c4 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -2335,7 +2335,7 @@ function App() {
                   hostname: requestBuyOrder?.hostname,
                   count: requestBuyOrder?.crosschainAtInfo?.length || 0,
                 }}
-                tOptions={{ postProcess: ['capitalizeFirst'] }}
+                tOptions={{ postProcess: ['capitalizeFirstChar'] }}
               >
                 The Application <br />
                 <italic>{{ hostname }}</italic> <br />
@@ -2446,7 +2446,7 @@ function App() {
                   hostname: requestBuyOrder?.hostname,
                   count: requestBuyOrder?.crosschainAtInfo?.length || 0,
                 }}
-                tOptions={{ postProcess: ['capitalizeFirst'] }}
+                tOptions={{ postProcess: ['capitalizeFirstChar'] }}
               >
                 The Application <br />
                 <italic>{{ hostname }}</italic> <br />
@@ -2928,7 +2928,7 @@ function App() {
                             />
                           ),
                         }}
-                        tOptions={{ postProcess: ['capitalizeFirst'] }}
+                        tOptions={{ postProcess: ['capitalizeFirstChar'] }}
                       >
                         A <seed>SEEDPHRASE</seed> has been randomly generated in
                         the background.
@@ -2965,7 +2965,7 @@ function App() {
                             />
                           ),
                         }}
-                        tOptions={{ postProcess: ['capitalizeFirst'] }}
+                        tOptions={{ postProcess: ['capitalizeFirstChar'] }}
                       >
                         Create your Qortal account by clicking <next>NEXT</next>{' '}
                         below.
diff --git a/src/components/Embeds/PollEmbed.tsx b/src/components/Embeds/PollEmbed.tsx
index 0765248..8a1d44c 100644
--- a/src/components/Embeds/PollEmbed.tsx
+++ b/src/components/Embeds/PollEmbed.tsx
@@ -215,7 +215,9 @@ export const PollCard = ({
                 setIsOpen(true);
               }}
             >
-              {t('core:action.show_poll', { postProcess: 'capitalizeFirst' })}
+              {t('core:action.show_poll', {
+                postProcess: 'capitalizeFirstChar',
+              })}
             </Button>
           </>
         )}
@@ -273,7 +275,7 @@ export const PollCard = ({
               fontSize: '18px',
             }}
           >
-            {t('core:option_other', { postProcess: 'capitalizeFirst' })}
+            {t('core:option_other', { postProcess: 'capitalizeFirstChar' })}
           </Typography>
 
           <RadioGroup
@@ -308,7 +310,7 @@ export const PollCard = ({
               disabled={!selectedOption || isLoadingSubmit}
               onClick={handleVote}
             >
-              {t('core:action.vote', { postProcess: 'capitalizeFirst' })}
+              {t('core:action.vote', { postProcess: 'capitalizeFirstChar' })}
             </Button>
 
             <Typography
@@ -337,7 +339,7 @@ export const PollCard = ({
             }}
           >
             {t('core:message.generic.already_voted', {
-              postProcess: 'capitalizeFirst',
+              postProcess: 'capitalizeFirstChar',
             })}
           </Typography>
 
@@ -350,7 +352,7 @@ export const PollCard = ({
               }}
             >
               {t('core:message.generic.processing_transaction', {
-                postProcess: 'capitalizeFirst',
+                postProcess: 'capitalizeFirstChar',
               })}
             </Typography>
           )}
@@ -361,8 +363,8 @@ export const PollCard = ({
             }}
           >
             {showResults
-              ? t('core:action.hide', { postProcess: 'capitalizeFirst' })
-              : t('core:action.close', { postProcess: 'capitalizeFirst' })}
+              ? t('core:action.hide', { postProcess: 'capitalizeFirstChar' })
+              : t('core:action.close', { postProcess: 'capitalizeFirstChar' })}
           </ButtonBase>
         </CardContent>
 
diff --git a/src/components/Group/AddGroupList.tsx b/src/components/Group/AddGroupList.tsx
index cd7bcf4..64c4b3b 100644
--- a/src/components/Group/AddGroupList.tsx
+++ b/src/components/Group/AddGroupList.tsx
@@ -190,7 +190,7 @@ export const AddGroupList = ({ setInfoSnack, setOpenSnack }) => {
               message:
                 error.message ||
                 t('core:message.error.generic', {
-                  postProcess: 'capitalizeFirst',
+                  postProcess: 'capitalizeFirstChar',
                 }),
             });
             setOpenSnack(true);
diff --git a/src/components/Group/BlockedUsersModal.tsx b/src/components/Group/BlockedUsersModal.tsx
index aa0ac0a..de9ec80 100644
--- a/src/components/Group/BlockedUsersModal.tsx
+++ b/src/components/Group/BlockedUsersModal.tsx
@@ -99,7 +99,7 @@ export const BlockedUsersModal = () => {
         if (!data?.owner)
           throw new Error(
             t('auth:message.error.name_not_existing', {
-              postProcess: 'capitalizeFirst',
+              postProcess: 'capitalizeFirstChar',
             })
           );
         if (data?.owner) {
@@ -138,9 +138,12 @@ export const BlockedUsersModal = () => {
     } catch (error) {
       setOpenSnackGlobal(true);
       setInfoSnackCustom({
-        //TODO translate
         type: 'error',
-        message: error?.message || 'Unable to block user',
+        message:
+          error?.message ||
+          t('auth:message.error.unable_block_user', {
+            postProcess: 'capitalizeFirstChar',
+          }),
       });
     }
   };
@@ -168,7 +171,9 @@ export const BlockedUsersModal = () => {
       aria-labelledby="alert-dialog-title"
       aria-describedby="alert-dialog-description"
     >
-      <DialogTitle>Blocked Users</DialogTitle>
+      <DialogTitle>
+        {t('auth:blocked_users', { postProcess: 'capitalizeFirstChar' })}
+      </DialogTitle>
       <DialogContent
         sx={{
           padding: '20px',
diff --git a/src/components/Group/ListOfBans.tsx b/src/components/Group/ListOfBans.tsx
index f9e026e..9399b7d 100644
--- a/src/components/Group/ListOfBans.tsx
+++ b/src/components/Group/ListOfBans.tsx
@@ -130,7 +130,7 @@ export const ListOfBans = ({ groupId, setInfoSnack, setOpenSnack, show }) => {
               message:
                 error.message ||
                 t('core:message.error.generic', {
-                  postProcess: 'capitalizeFirst',
+                  postProcess: 'capitalizeFirstChar',
                 }),
             });
             setOpenSnack(true);
diff --git a/src/components/Group/WalletsAppWrapper.tsx b/src/components/Group/WalletsAppWrapper.tsx
index ef2b66c..ee9885a 100644
--- a/src/components/Group/WalletsAppWrapper.tsx
+++ b/src/components/Group/WalletsAppWrapper.tsx
@@ -90,7 +90,9 @@ export const WalletsAppWrapper = () => {
               }}
             >
               <Typography>
-                {t('core:q_apps.q_wallets', { postProcess: 'capitalizeFirst' })}
+                {t('core:q_apps.q_wallets', {
+                  postProcess: 'capitalizeFirstChar',
+                })}
               </Typography>
 
               <ButtonBase onClick={handleClose}>
diff --git a/src/components/MainAvatar.tsx b/src/components/MainAvatar.tsx
index d81c029..be55714 100644
--- a/src/components/MainAvatar.tsx
+++ b/src/components/MainAvatar.tsx
@@ -106,7 +106,7 @@ export const MainAvatar = ({ myName, balance, setOpenSnack, setInfoSnack }) => {
             rej(
               error.message ||
                 t('core:message.error.generic', {
-                  postProcess: 'capitalizeFirst',
+                  postProcess: 'capitalizeFirstChar',
                 })
             );
           });
diff --git a/src/components/UserLookup.tsx/UserLookup.tsx b/src/components/UserLookup.tsx/UserLookup.tsx
index f227507..675d661 100644
--- a/src/components/UserLookup.tsx/UserLookup.tsx
+++ b/src/components/UserLookup.tsx/UserLookup.tsx
@@ -68,7 +68,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
         if (!inputAddressOrName?.trim())
           throw new Error(
             t('auth:action.insert_name_address', {
-              postProcess: 'capitalizeFirst',
+              postProcess: 'capitalizeFirstChar',
             })
           );
 
@@ -76,7 +76,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
         if (!owner)
           throw new Error(
             t('auth:message.error.name_not_existing', {
-              postProcess: 'capitalizeFirst',
+              postProcess: 'capitalizeFirstChar',
             })
           );
 
@@ -84,7 +84,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
         if (!addressInfoRes?.publicKey) {
           throw new Error(
             t('auth:message.error.address_not_existing', {
-              postProcess: 'capitalizeFirst',
+              postProcess: 'capitalizeFirstChar',
             })
           );
         }
@@ -192,7 +192,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                 autoComplete="off"
                 {...params}
                 label={t('auth:address_name', {
-                  postProcess: 'capitalizeFirst',
+                  postProcess: 'capitalizeFirstChar',
                 })}
                 onKeyDown={(e) => {
                   if (e.key === 'Enter' && nameOrAddress) {
@@ -288,7 +288,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                   >
                     {addressInfo?.name ??
                       t('auth:message.error.name_not_registered', {
-                        postProcess: 'capitalizeFirst',
+                        postProcess: 'capitalizeFirstChar',
                       })}
                   </Typography>
 
@@ -331,7 +331,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                       textAlign: 'center',
                     }}
                   >
-                    {t('core:level', { postProcess: 'capitalizeFirst' })}{' '}
+                    {t('core:level', { postProcess: 'capitalizeFirstChar' })}{' '}
                     {addressInfo?.level}
                   </Typography>
                 </Card>
@@ -362,7 +362,9 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                       }}
                     >
                       <Typography>
-                        {t('auth:address', { postProcess: 'capitalizeFirst' })}
+                        {t('auth:address', {
+                          postProcess: 'capitalizeFirstChar',
+                        })}
                       </Typography>
                     </Box>
 
@@ -376,7 +378,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                           }}
                         >
                           {t('auth:action.copy_address', {
-                            postProcess: 'capitalizeFirst',
+                            postProcess: 'capitalizeFirstChar',
                           })}
                         </span>
                       }
@@ -422,7 +424,9 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                     }}
                   >
                     <Typography>
-                      {t('core:balance', { postProcess: 'capitalizeFirst' })}
+                      {t('core:balance', {
+                        postProcess: 'capitalizeFirstChar',
+                      })}
                     </Typography>
 
                     <Typography>{addressInfo?.balance}</Typography>
@@ -440,7 +444,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                     }}
                   >
                     {t('core:action.send_qort', {
-                      postProcess: 'capitalizeFirst',
+                      postProcess: 'capitalizeFirstChar',
                     })}
                   </Button>
                 </Card>
@@ -478,7 +482,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
               <Typography>
                 {t('core:message.generic.most_recent_payment', {
                   count: 20,
-                  postProcess: 'capitalizeFirst',
+                  postProcess: 'capitalizeFirstChar',
                 })}
               </Typography>
 
@@ -494,7 +498,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                 >
                   <Typography>
                     {t('core:message.generic.no_payments', {
-                      postProcess: 'capitalizeFirst',
+                      postProcess: 'capitalizeFirstChar',
                     })}
                   </Typography>
                 </Box>
@@ -504,16 +508,20 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                 <TableHead>
                   <TableRow>
                     <TableCell>
-                      {t('core:sender', { postProcess: 'capitalizeFirst' })}
+                      {t('core:sender', { postProcess: 'capitalizeFirstChar' })}
                     </TableCell>
                     <TableCell>
-                      {t('core:receiver', { postProcess: 'capitalizeFirst' })}
+                      {t('core:receiver', {
+                        postProcess: 'capitalizeFirstChar',
+                      })}
                     </TableCell>
                     <TableCell>
-                      {t('core:amount', { postProcess: 'capitalizeFirst' })}
+                      {t('core:amount', { postProcess: 'capitalizeFirstChar' })}
                     </TableCell>
                     <TableCell>
-                      {t('core:time.time', { postProcess: 'capitalizeFirst' })}
+                      {t('core:time.time', {
+                        postProcess: 'capitalizeFirstChar',
+                      })}
                     </TableCell>
                   </TableRow>
                 </TableHead>
@@ -532,7 +540,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                               }}
                             >
                               {t('auth:action.copy_address', {
-                                postProcess: 'capitalizeFirst',
+                                postProcess: 'capitalizeFirstChar',
                               })}
                             </span>
                           }
@@ -577,7 +585,7 @@ export const UserLookup = ({ isOpenDrawerLookup, setIsOpenDrawerLookup }) => {
                               }}
                             >
                               {t('auth:action.copy_address', {
-                                postProcess: 'capitalizeFirst',
+                                postProcess: 'capitalizeFirstChar',
                               })}
                             </span>
                           }
diff --git a/src/components/WrapperUserAction.tsx b/src/components/WrapperUserAction.tsx
index afcb686..e046ff1 100644
--- a/src/components/WrapperUserAction.tsx
+++ b/src/components/WrapperUserAction.tsx
@@ -98,7 +98,7 @@ export const WrapperUserAction = ({ children, address, name, disabled }) => {
                 justifyContent: 'flex-start',
               }}
             >
-              {t('core:message.message', { postProcess: 'capitalizeFirst' })}
+              {t('core:message.message', { postProcess: 'capitalizeFirstChar' })}
             </Button>
 
             {/* Option 2: Send QORT */}
@@ -117,7 +117,7 @@ export const WrapperUserAction = ({ children, address, name, disabled }) => {
               }}
             >
               {t('core:action.send_qort', {
-                postProcess: 'capitalizeFirst',
+                postProcess: 'capitalizeFirstChar',
               })}
             </Button>
 
@@ -133,7 +133,7 @@ export const WrapperUserAction = ({ children, address, name, disabled }) => {
               }}
             >
               {t('auth:action.copy_address', {
-                postProcess: 'capitalizeFirst',
+                postProcess: 'capitalizeFirstChar',
               })}
             </Button>
 
@@ -151,7 +151,7 @@ export const WrapperUserAction = ({ children, address, name, disabled }) => {
               }}
             >
               {t('core:user_lookup', {
-                postProcess: 'capitalizeFirst',
+                postProcess: 'capitalizeFirstChar',
               })}
             </Button>
 
@@ -208,8 +208,8 @@ const BlockUser = ({ address, name, handleClose }) => {
         <CircularProgress color="secondary" size={24} />
       )}
       {isAlreadyBlocked &&
-        t('core:action.unblock_name', { postProcess: 'capitalizeFirst' })}
-      {isAlreadyBlocked === false &&  t('core:action.block_name', { postProcess: 'capitalizeFirst' })}}
+        t('core:action.unblock_name', { postProcess: 'capitalizeFirstChar' })}
+      {isAlreadyBlocked === false &&  t('core:action.block_name', { postProcess: 'capitalizeFirstChar' })}}
     </Button>
   );
 };
diff --git a/src/i18n/locales/en/auth.json b/src/i18n/locales/en/auth.json
index a1dca21..ba017dd 100644
--- a/src/i18n/locales/en/auth.json
+++ b/src/i18n/locales/en/auth.json
@@ -35,6 +35,7 @@
     "key": "API key",
     "select_valid": "select a valid apikey"
   },
+  "blocked_users": "blocked users",
   "build_version": "build version",
   "message": {
     "error": {
@@ -46,6 +47,7 @@
       "invalid_secret_key": "secretKey is not valid",
       "name_not_existing": "name does not exist",
       "name_not_registered": "name not registered",
+      "unable_block_user": "unable to block user",
       "unable_decrypt": "unable to decrypt",
       "unable_reencrypt_secret_key": "unable to re-encrypt secret key"
     },