As listed here, Prolog is not currently supported by Stack Exchange but it is supported by the underlying library highlight.js.
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3Note: We are currently not adding additional syntax highlighting languages until additional work on our highlighting code can be done.– animuson StaffModDec 31, 2021 at 3:19
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Thank you for the update and reference.– bmitcDec 31, 2021 at 9:01