I'd actually keep up the "baby talk" to be honest. If I had my time over I would have worried more about my son's speech and I wish I'd "dumbed down" my talking earlier to help him. He's 3.5 and I'm being told to talk to him in one and two word sentences when possible. I should have been doing that 2 years ago! I'd say things like "Drink! Here it is". Offer lots of clear one word names for things. Then you can add the descriptors like you're doing. "Cup. Blue cup", "Apple. Yummy apple" etc. If she is pointing and using joint attention (look at you, look at the item etc) then I wouldn't stress though.
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