At this stage, your kiddo's language abilities are becoming more complex. He understands and uses more sophisticated language forms as he is using more grammar and more variety.
What you need to know:
At this age, your child may be able to think and understand more complex things so this way he would be able to express more ideas. Socially, he may love to interact more with peers and family members. He would talk a lot, even when alone. Your child would talk full and sometimes complex sentences in your mother tongue as his vocabulary is growing faster due to his rapid brain development. Your child is learning 5-10 words at this age. Try and encourage him to talk and speak as much as he can to express more of his ideas in his native language.