Read the text and determine if the sentence is true:

The Okanagan Highland is an elevated hilly plateau area in British Columbia, Canada, and the U.S. state of Washington (where it is spelled Okanogan Highlands). Rounded mountains with elevations up to 8,000 feet above sea level and deep, narrow valleys are characteristic of the region.

Sentence: The spelling Okanogan Highland is most commonly accepted.
It's impossible to say