At 2 years few words ,about 20 , understanding of : you ,I ,they should be their  and two word sentences, is their . donot encourage  pointing towards things. You must actively talk and pay more attention to receptive speech  like ask him questions ,what color is the ball  example like red and not where is the ball . where ...the answer he will point . Help him to  say like if he says  re  for red  say reeee  ddddd, help him patiently Also most important..... stop mobile and tv

No worries... at these age its normal

At 2 years age child make sentences with three words plus they have vocabulary of 50 to 100 words . you can encourage the child to speak words by showing it in nature or with the help of toys or pictured book or showing rhymes. you have to talk to him in single language only don't use multiple languages even at home .

A child speaks 50 to 100 new words by 2 years . Some children speak 2 word sentences but not all.

Don't worry it will catch up more words if other milestones are normal.