Dr Iribe tells me: "I can see the justification in requesting the Duke's last couplet; it gave me quite some problems too!"
The translation was published in 2012 by Oxford University Press East Africa. (TC)
Maliki: Na iwe hivyo.
Alamsiki. [Kwa Brabantio] Na, Mheshimiwa
Endapo urembo utakosa maadili na furaha
Mkazamwanao ni bora kuliko weusi wake.
Duke: So be it.
Goodnight [To Brabentio] And, your Excellency
If beauty lacks virtue and joy (delight)
Your son in law is much better than his black complexion.