SpamAssassin Rule: UNWANTED_LANGUAGE_BODY
Standard description: Message written in an undesired language
Explanation
The content of the mail appears to be in a language not permitted by the value of the ok_languages configuration setting.
Further Info
The default scores for this rule can be found in the online list of tests.
The default value of ok_languages is "all", so this rule will only trigger if the value has been locally specified.