Desktop showing a line of code instead of 'Remove'

[jefwic]

Under Create Subdomain on the Desktop Plesk is showing:

Ui__client/Domain/Hosting/Subdomains/Subdomain/Delete_readonly-unknown__short-title

instead of:

Remove

All the other links are fine, it's just this one. I have the feeling it may be something missing with the language file but I'm not sure how to go about checking/fixing it.