Help with simple nametrans

[Chris Dennis]

Hello Offlineimap people

I don't speak Python, and I can't find a simple example of a nametrans 
that doesn't use regular expressions.

I'm syncing between a remote server that puts junk in a folder called 
'Spam', and a local one where junk is called 'Junk E-mail'.

So I just want to translate 'Spam' to 'Junk E-mail' and back again.

Could somebody kindly come up with the relevant nametrans incantation 
for me?

regards

Chris