Prince2 is an internationally used project management methodology.

No. And there are currently no known plans to develop such a version.

This is often debated, as it depends what is meant by public domain. However, as it is copyright protected, strictly speaking the answer is no.

Use of the Prince2 logo is restricted to accredited organisations only. In the UK, the APM Group controls accreditation and standards for the Prince2 method

Prince2 is owned by the UK's Office of Government Commerce (OGC) formerly known as the CCTA.

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