govoriti → govorim

The complete present is govorim, govoriš, govori, govorimo, govorite, govore. The third-person plural ends in -e, as in rade.

Govorim hrvatski. says that the speaker speaks Croatian. It can describe ability or actual current language use, depending on context. Sada govorim hrvatski. makes the current use explicit.

A language expression such as hrvatski functions adverbially here. Do not change it to hrvatska to match a female speaker. A fuller noun phrase such as hrvatski jezik has its own inflection in other constructions, so identify which structure the sentence actually uses.