I'm not sure what you are asking. As a newcomer you might like these links. On the page with the sentences on the top left you will see *"Tips & notes" which among other useful information includes different ways to get the Greek keyboard. There is also the link to the Greek Forums with other information and even a way to use English letters for the Greek.
Also, for the two main verbs in Greek. είμαι I am and έχω I have here is a good site click here
Best wishes. If you have any questions just ask.
This is an automatic contraction done by Duolingo -- not something that course maintainers have control over.
If you'd like to report a bug to Duolingo headquarters, see https://support.duolingo.com/hc/en-us/articles/204728264-How-do-I-report-a-bug- for how to do so.
I guessed "He is a child" Correct answer shown: "He's a child."
The correct answer should be (I think): He HAS a child. "He's" is not a contraction for "he has" in this sense. "He's a child" is not a natural English contraction of "He has a child."
I believe this is a "feature" of Duolingo where it will automatically contract and uncontract contractions... without regard to whether that contraction is possible in that situation in English.
"he has" can turn into "he's" in some cases (e.g. he has gone now / he's gone now) but not others, but the code isn't clever enough to recognise that "he has a child" cannot turn into "he's a child" and may show you that anyway.
That's not something that's under our control as course maintainers as far as I know.