My 22 month baby speak only few words like papa mumma Kya mum and few words more I m worried when will he speak proper way I have seen many babies speak more words what to do to increase his vocab

This is absolute normal. Don't worry for it. Engage her by telling her real stories which involve her like one day she was playing with her doll, doll was wearing red color dress and so on... this will make her think and will provoke her to ask question like which doll, whats red color and so on.... Add chart of fruits , vegetables, alphabets on walls, doors wherever you think she will stop by and try to watch and understand chart. Tell her this is this and that keep her engage but not over do, Buy matt for her with alqphatbhets, get story books in your language, read it to her, explain her Play game with her of buying selling toys fruits with her such activities will make her to speak like buy 1 potato for me, buy her kitchen set ask her to make tea, coffee etc.. Play all this conversational games with her. young minds will grasp faster she will eventually try to engage then.