1) System sends an HTML link in email which needs to be clicked for verification seems like your iphone is hiding this link please check this post this may
iPhone Tip – Message cannot be displayed because of the way it is formatted
Here is an iPhone Email Tip that will hopefully save you some frustration:
When reading your email with your iPhone, have you ever got the following message?
"This message cannot be displayed because of the way it is formatted. Ask the sender to send it again using a different format or email program. Multipart/Alternative"
If this happens to you, you can work around the problem by first deleting your message. Then go find the message in your trash and move the message back to your in-box. You should now be able to read the message properly.
Apparently this was an issue with iOS 3. It was fixed in iOS 4. Unfortunately the bug seems to be back again in iOS 5.
2) Custom requests can be send in Email but the support requests needs to go through ticket system.
3) Now translation is a completely different way, and includes locales/ directory in which you can find various translations. As english is default language of script so to edit english strings you need to edit the prespective file and edit the string in file directory.