The British spelling of the process of becoming cosmopolitan; the act of making something worldwide in scope or appeal, or of adopting cosmopolitan values.
From cosmopolitan + -ise (British spelling of -ize) + -ation (noun suffix indicating process). British English preserves the 's' spelling in forming the noun, while American English uses 'z'.
The spelling difference between cosmopolitanisation (British) and cosmopolitanization (American) is a cosmopolitan issue itself—two nations sharing a language yet spelling the same concept differently shows how even standardization fractures across cultures.
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