Several dozen private preservation areas and protection zones encompass thousands of additional acres. These are the official State holidays in Costa Rica. Much of the country shuts down. We are mainly of European descent, mostly Spanish. However, you are likely to see any nationality you can name as Costa Rica has drawn immigrants from all corners of the globe.
Official language is Spanish, but many Ticos speak at least a little English.
It is not recommended to change money on the street. Money can, of course, be exchanged at the banks, but the lines and bureaucracy make it very inconvenient. Best advice is to bring twenties or smaller, or travelers checks. Banks close at 3 o'clock. Most hotels and tourist oriented businesses accept major credit cards.