Yes, I found that out soon after posting on your profile.
It appears that Duo has changed its new word yellow highlighting, so that a new word appears yellow for the entire lesson.
Naturally, in Basics 1, all words are new, and because of the new highlighting rules, they're all yellow for the whole lesson.
Hi reborrn, not really, In Esperanto there is no article,
I am the man. = Mi estas la viro.
I am a man. = Mi estas viro.
If you say : One night = Nokto. without any article, It carries by itself.
I hope to have you helped If there are doubts or mistakes please comment
Greetings and luck
Hi reborrn, sure, I know what It is learning Spanish because I am a bilingual, but the first problem is when you are referring to the gender of that word, It's very very confusing, but as I learned all of that, It is a little easier now, If you need help to learn Spanish for me will be a pleasure to help you.
Greetings and luck.