Hello and welcome to hcm forum,
Thanks for posting your query.
Since your baby is only of the age of 2 years,the baby will be having infantile swallow pattern as well as tongue thrusting habit .
So once your baby gets all the teeth and saliva discharge is controlled by themselves,speech will become normal.
This is only physiological process and nothing to worry in this.
Maintain your baby's oral hygiene
Brush your baby's teeth daily.
Give plenty of nutritious food too.