Chamorro is an Austronesian language spoken by about 50,000 people mainly in Guam, and also in the Northern Mariana Islands and the USA. Chamorro contains a huge number of words of Spanish origin and this has lead some to mistakenly believe that it is a Spanish-based Creole.
Chamorro first started to appear in writing in 1668 when a missionary by the name of Father San Vitores devised a spelling system for the language using the Latin alphabet. Since then various spelling systems have been used.
source
wikipedia.org,
omniglot.com &
ethnologue.com