“μίλαγα” means “I was speaking”. It is first singular person of the verb “μιλάω” ( = to speak, to talk) in Past Continuous.
The normal conjugation of the verb “μιλάω” (and of other verbs belonging in the same group)in Past Continuous is this, according to the Grammar:
μιλούσα = I was speaking
μιλούσες = you were speaking
μιλούσε = he / she /it was speaking
μιλούσαμε = we were speaking
μιλούσατε= we were speaking
μιλούσαν/ μιλούσανε = they were speaking
However there is a more informal conjugation, used mostly in the oral speech:
μίλαγα = I was speaking
μίλαγες = you were speaking
μίλαγε = he / she /it was speaking
μιλάγαμε = we were speaking
μιλάγατε = we were speaking
μίλαγαν = they were speaking
The above informal conjugation is more common in central and south Greece.
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.