araña / pingüino? New words missing as vocabulary
Hey everyone, When I did the animals-section, 2 'slides' prompted me to remember the vocabulary for spider and penguin, but it never again appeared in any 'slides' nor in my vocabulary. Is that a bug? I'd rather have it appear as vocabulary and have it appear in sentences every now and then. Chances are slim I learn it when it only appears once in my entire learning history.