Translation:The mother writes and the brother sleeps at home.
In English you can refer to someone by their designation or rank, such as Mother or Lieutenant (though, when done with ranks it sounds odd when you omit the article unless addressing the person in question directly). If you omit the definite or indefinite articles, then it sounds like you are talking about your own family members.
The funny thing is, is that I have had other questions where I omitted the articles and was marked as correct.
If you were speaking of your own family it would be "Mater mea scribit, frater meus domi dormit", so the answer would be no. I dont really know if they didn't use articles in a more formal environment but I don't really think it would apply here anyway. So the answer is that nouns without a possesive will fall into the categories of "A noun" or "The noun", and the listener will have to choose which article is more suitable.
Yes. I thought if WAS Marcus and got it wrong. Audio overall in the entire course is only barely passable. I understand. Good audio takes some equipment but better audio is possible with only a little more effort. You can put a towel over your head and the computer to kill the harsh effect of acoustic reflection. (I assume the speakers are talking into built in mics from some distance in a room with hard walls). Also speakers can lean in close to mics. And if you where headphones you can hear what you sound like.
These recordings are not very good. The echo in the live room is creating problems. This is not very difficult to resolve. Some of these recordings just sound very bad are are difficult to understand because there was very little focus on basic technical issues. And, by the way, Rae, you are a very rude person!
"Est" should be an optional thing to put in. A lot of actual Latin can use and not use articles, because a lot of it depends on the ending of the verbs and nouns. Though you shouldn't punish someone for adding the articles because it's still grammatically correct in the end.
Latin is 'mother' to not only Italian, but French, Spanish, Portuguese, and Romanche... not to mention a good chunk of English. There are significant differences between the parent and child languages, given 1500+ years of development. Latin pronunciation doesn't track exactly with any of them.