https://cooljugator.com/gr/%CE%BC%CE%B9%CE%BB%CE%AC%CF%89 says the third person singular form of μιλάω is μιλά
Sorry, about that. I've corrected it. I see you have taken on a lot of languages. Try these tips which work for all languages.
TIPS TO MAKE LEARNING EASIER + HOW TO REPORT A PROBLEM https://forum.duolingo.com/comment/22424028
And check out the Greek Forum here with more links.