MediaWiki:Apihelp-json-param-utf8
If specified, encodes most (but not all) non-ASCII characters as UTF-8 instead of replacing them with hexadecimal escape sequences. Default when formatversion is not 1.
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If specified, encodes most (but not all) non-ASCII characters as UTF-8 instead of replacing them with hexadecimal escape sequences. Default when formatversion is not 1.