Cebuano Speaking Organization of Oregon and Southwest Washington. CSO-OSW exists to preserve and promote the Cebuano language and pride in the culture of the Cebuano speaking people in the Pacific Northwest. The CSO-OSW holds events throughout the year to provide Cebuano speakers chances to enjoy and share their language and culture with one another, their families and friends, and anyone interested in the Cebuano world. Anyone may join, and all are welcome.