Translation:My younger brother studies English.
Here it is very well explained.
I wrote this, "Мой моладший брат изучает английский" and received a ding and a green sign that said I was correct.
For years, I have been writing that Duo should call out every mistake, instead of letting small mistakes go by while saying, "you have a typo."
Today, Duo let me pass with a mistake, and I was not alerted at all. The only reason I noticed was that I was surprised that I had typed it correctly...and I saw that I had NOT typed it correctly.
Was this an error, or is моладший and alternate spelling or something (possibly like Donald Trumps "alternative facts?").