This chart outlines by what age most children develop speech sounds.
This link from the American Speech and Hearing Association (ASHA) describes typical speech and language development.
This website is a nationally known and great resource for parents, students and teachers alike!
"There are rules for how we use language in different situations and with different people. Adults and children can have trouble with these social communication rules. Speech-language pathologists, or SLPs, can help (ASHA, 2018)."