The Eleventh Revision of the International Classification of Disease was approved by the World Health Assembly in May 2019, and came into effect as a basis for statistical reporting by member states to the World Health Organization (WHO), in January 2022. The Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural and Neurodevelopmental Disorders (CDDR) was published by WHO in English in March 2024 (https://www.who.int/publications/i/item/9789240077263), and has since been downloaded more than 250,000 times from the WHO website. Moreover, data indicates that the number of downloads per month continues to increase over time. The highest demand has been among English-speaking countries (the UK, USA, India), but there has been substantial demand in non-English speaking countries where there has been a substantial discussion of ICD-11 implementation and widespread English proficiency (e.g., Germany, Denmark, Poland). Many countries, including several European countries, have indicated that they plan to fully implement the ICD-11 in their health information systems in 2027. Other countries (e.g., Scotland) have implemented the ICD-11 in their national clinical systems because they believe that clinicians should have access to diagnostic guidelines based on current scientific information and best standards of practice even if their systems for reporting diagnoses to and by the government are lagging behind. (They have created cross-walks for translating ICD-11 diagnoses back to ICD-10 for reporting purposes.) As a result of these circumstances, there is a huge demand for development and dissemination of the CDDR into national languages as well as for global workforce development. WHO has issued or is currently negotiating contracts for translations of the CDDR into a dozen languages, but much more needs to be done. The development of multilingual training programmes and materials for workforce development will also be discussed.