She might have vocal chord and aural development above her peers. Toddlers know many words before they can form the sounds to speak them. My DD1 had this. She was speaking before 1 and had an extensive vocab at 17 and her saying something like "ominous weather today, mommy" would have been normal for her. To this day, she's a talker. We joke she came out the womb excited to tell us all about the 9mo she spent there.
When DD2 came, we feared she had developmental delays and took her in for testing. Turns out, she was totally normal, slightly above average vocabulary, but we'd compared her to DD1!! She grew up to be sportier than DD1 (who is average in sports), so she's got that over her big sister ;).
DD1 rapidly picks up languages and is fluent in French, Spanish and German and can make conversation in Czech, Arabic and Galician and probably other languages she's failed to tell me about. Her pronunciation is excellent and she has an ear for music (can hear pitch) as does DD2.
HOWEVER...neither have ASD or ADHD and I wouldn't consider them gifted and talented in the traditional sense. DD1 is smart and got good grades in sciences and math, but is not brilliant in these areas. DD2 is also smart and has good grades, and has near perfect musical pitch.
In sum, I'd say we gave our children good genes in music and languages, but neither will be astrophysicists.
DD1 is now a journalist, not surprising, as she's simply gifted in language and speech.
At this age, OP, just follow your DD's interests and encourage her in them. Don't worry too much. She'll be fine.