Manual:$wgOutputEncoding

Language, regional and character encoding settings: $wgOutputEncoding
The encoding of the output text.
Introduced in version:pre 1.1.0
Deprecated in version:1.5.0
Removed in version:1.18.0 (r87589)
Allowed values:(string)
Default value:'UTF-8' (1.5-1.17)
'ISO-8859-1' (1.1-1.4)

Details edit

The encoding of the output text.

LanguageUtf8.php normally overrides this unless you set $wgUseLatin1 to true.

See also edit