From ISO download statistics, you may see that XiVO is used in a lot of countries over the world :

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France, Algeria, Argentina, Austria, Belgium, Brazil, Canada, Colombia, Croatia, Czech Republic, Finland, Germany, Great Britain, Greece, Hungary, Iceland, Indonesia, Israel, Italy, Lithuania, Luxembourg, Montenegro, Netherlands, New Caledonia (French), Poland, Portugal Russian Federation, Slovak Republic, South Africa, Spain, Switzerland, United Kingdom, United States, Vietnam