My 15 month old daughter knows over 50 words, she knows the meaning and used them on a daily basis. Some of these words are in Spanish and English, for example she knows what 'bye' means as well as 'adiós' (bye in Spanish) and uses them correctly every time. She can also count to 10 in both languages and learns the words very quickly, i.e she may hear a word today and will start using the word straight away, there have been times where she has said a new word and we started asking ourselves how she learnt it and how so quickly, sometimes she picks them up from the cartoons and will remember the word and use it correctly.
She also learns most of the words to the songs we play for her on YouTube like twinkle twinkle or head shoulders knees and toes (she doesn't pronounce every word correctly but she says them). She can point at her nose, mouth, eyes, feet, fingers and she knows what they are called in both English and Spanish.
She is extremely sociable so I don't think she's autistic and she doesn't have any autism signs.
Could she be gifted? Or is this normal in 15 month olds?