Gene, gyrate, general, geography, geriatric, gist, etc. The letter 'j' didn't exist in English until something like 300 years ago. They made 'i' do double duty, e.g., 'iust' (just). There are some things about English spelling that could be cleaned up, but the general problem is that English is phonetically complex, so a comprehensive cleanup is impossible, and this discourages minor cleanups. For example, English has 50 different sounds, while Spanish has only 30, so English overloads the alphabet.