All scripts, including traditional scripts ranging from Chinese to Arabic script, are human creations. However, scripts usually evolve out of other scripts rather than being designed by an individual. In most cases, alphabets are adopted, i.e. a language is written in another language's script at first, and gradually develops peculiarities specific to its new environment over the centuries (such as the letters w and j added to the Latin alphabet over time, not being formally considered full members of the English (as opposed to Latin) alphabet until the mid-1800s).