Hold down the [CTRL] button while you enter the cheat. If you want to use the cheat more then once, release [CTRL], re-press it, and enter the code again.
Additional $20,000 - pesos
Set treasury amount - exacto [number]
Faster building - rapido
Add 10 to Happiness - contento
Kill selected unit - muerte
Political level of difficulty - politicaldifficulty
Economic level of difficulty - economicdifficulty