Spoke like a Persian perhaps, but extremely misinformed about every vowel (7)

'spoke like a persian perhaps' is the definition.
I can't tell whether this defines the answer.

'extremely misinformed about every vowel' is the wordplay.
'extremely' suggests removing the centre (only the extremes of the word are used).
'about' is an insertion indicator.
'every' becomes 'ao' (I can't justify this - if you can you should give a lot more credence to this answer).
'vowel' becomes 'u'.
'misinformed' with its centre taken out is 'mied'.
'ao'+'u'='aou'
'mied' placed around 'aou' is 'MIAOUED'.

'but' acts as a link.

Can you help me to learn more?