Toddler not talking?

Amanda 😍 • Mama to Jade & Seraphina ❤️1/5/18❤️6/3/19❤️

For those with toddlers I have a question.

My almost 2 year old refuses to talk. I know she knows what words mean. She follows instructions and can point at things but refuses to use her words. She used to say words like nana for banana and Sissy and mama/dada but now she doesn't try to say those anymore. Have your toddlers done this? How can I encourage her to use her words again?