Simplify the following text for a Grade 9 native English-speaking person.
Original: Other forms of diabetes mellitus include congenital diabetes , which is due to genetic defects of insulin secretion , cystic fibrosis-related diabetes , steroid diabetes induced by high doses of glucocorticoids , and several forms of monogenic diabetes .
Simplified: There are other kinds of diabetes , like diabetes insipidus . However , when people say `` diabetes '' , they usually mean diabetes mellitus .