A constant scream from me also - it needs a fix, and some have been suggested from a number of users. 

These ‘errors’ can incorrectly drop the bot’s “confidence” in us quite markedly at times, requiring many repetitions to regain. Have to please the bot! 

Yet, finding typos - including those that read as grammatical errors in agreement or conjugation - is not that uncommon in material on the site.  

There needs to be a simple self-correct override on the quizzes (not a full self-marking system) - after all, if we misuse it, we only affect ourselves and gain falsely strong confidence.