Clearly, there is speech delay: you need early urgent evaluation towards developmental milestones, including gross motor, fine motor, social & language. Also screening tests depends on whether other domains of development are affected too & it's extent: hearing, vision, metabolic workup, etc.
Next Steps
Please don't lose valuable time, as early intervention is the key.
Health Tips
Approach urgently a good Medical College setup as this will require multi-disciplinary team approach