RE: You half to help me!

[--]

Dear linguists, I have recently seen "(you) half to..." for "(you) have
to..." in two different pieces of writing. The first instance was in an
official U.S. booklet aimed at (under)graduate students. The second one
was contained in an email sent to me by a college secretary.

What can you say about this construction other than it is a spelling
error? Has it gained any sort of unconscious acceptance? How could that
have come about?

Thank you for any helpful insights,

Steve Roti