The spelling of the English word "diversity" is identical in Zimbabwe as in all other English-speaking countries:
D-I-V-E-R-S-I-T-Y
Zimbabwe uses British English spelling conventions (e.g., *colour, centre, analyse*), but "diversity" has no variant spelling in any standard English dialect. The pronunciation may reflect local accent features (e.g., /daɪˈvɜːsɪti/), but the orthography is fixed.
In Zimbabwe's other official languages (Shona, Ndebele), the concept is expressed as kugadzikana (Shona) or ukwahlukana (Ndebele)—but the English term remains "diversity."