I feel your pain, as a former early childhood educator, I have way too much information for my own good. It makes me neurotic.
A great thing to do to increase language skills is to find other people who can talk to your child. She gets used to hearing your voice and speech rhythms and vocabulary. It becomes less interesting to her. When other people (relatives, moms from a playgroup, etc) talk to her, it will be new and exciting and spark interest. So offer to swap kids with a friend at a play date spend time reading and playing with eachother's children.
Music is another great way to expand language skills. Try getting her enrolled in a music class for toddlers, or check out the library for lapsit/story times. Or just start singing to her. Sing the same songs over and over throughout the day.
That being said, I have understood that children mostly focus on learning one set of skills at a time. Their brain is focused on either large motor skills, or fine motor skills, or language skills, etc. for a period of time and then switches. These learning periods can last a few days to several weeks. You need to capitalize on what you daughter is focused on for that time period. Maybe she is focused on large motor skills right now and needs you to give her more opportunities to master those skills. My son, also 19 months didn't start walking until he was 16 months old, he still does not run or jump - but he has about 200 words in his vocab. Each kid develops differently and can be focused on a different skill set at different times. What your daughter needs from you is encouragement to master the skill set she is working on right now, and be patient with the language skills until her brain shifts into that mode. Let her direct activities and be just as enthusiastic about jumping on pillows as you are reading a book. Both are equally valuable learning experiences for your daughter.