E.C.
I wouldn't worry yet. The language explosion happens at about 2 years old. My first child was a talker -- over 100 words and starting sentences at a year old. My second made barely a peep at a year old. At her two year old appointment I was planning on asking for speech help for her. She wouldn't even attempt words (I'd say, try to get her to repeat and she would shake her head no). I knew the language explosion was supposed to happen at around 2 but after such a talker the first time around I was worried. About a week before her appointment she started with words, trying to repeat everything. At the appointment they asked if she had 10 words. Normal at 2 years old is at least 10 words. Thanks to her little explosion the week before she had way more than 10. I even laughed and told them that if they had asked a week ago I would have said no! Now at 2 years and 1 month she has tons of words and more and more every day. I would wait until her 2 year appointment and explore it then if she still isn't talking. At least around me, places won't do speech interventions until 2 years old.
Good luck! She sounds absolutely normal and very smart to follow such complicated directions. Enjoy her! Once she starts talking, she'll never stop!
E.