[3.3.5] Core/Logs: English text corrections

This is an attempt to proofread standard error messages and system messages
from both core and DB. The corrections span typos, grammar and punctuation.

Because some of these messages can have multiple meanings depending on context,
this PR will stay in "WIP" status until the corrections have been validated and approved.

You are welcome to suggest improvements and files not yet included in this list.

Thanks to @Kinzcool for suggesting this line of work. :)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/server/game/Mails/Mail.cpp b/src/server/game/Mails/Mail.cpp
index b0e8a1ebe02..bc31a3c8c06 100644
--- a/src/server/game/Mails/Mail.cpp
+++ b/src/server/game/Mails/Mail.cpp
@@ -49,8 +49,8 @@ MailSender::MailSender(Object* sender, MailStationery stationery) : m_stationery
             break;
         default:
             m_messageType = MAIL_NORMAL;
-            m_senderId = 0;                                 // will show mail from not existed player
-            TC_LOG_ERROR("misc", "MailSender::MailSender - Mail have unexpected sender typeid (%u)", sender->GetTypeId());
+            m_senderId = 0;                                 // will show mail from non-existing player
+            TC_LOG_ERROR("misc", "MailSender::MailSender - Mail message contains unexpected sender typeid (%u).", sender->GetTypeId());
             break;
     }
 }