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Rule "No comma before 'which'"

This is one of many errors that LanguageTool can detect.

Description: No comma before 'which'
By default, this rule is not active in LanguageTool
Message: Probably a comma is missing here: <suggestion>\1, \2</suggestion>. Or if you want to use a restrictive clause, use <suggestion>\1 that</suggestion>.
Category: Punctuation (ID: PUNCTUATION)
Link: https://jakubmarian.com/is-that-always-restrictive-and-which-non-restrictive/
Incorrect sentences
that this rule can detect:
  • I am going to the house which burned down.
    Correction suggestion: house, which, house that
Correct sentences
for comparison:
  • The science fair, which lasted all day, ended with an awards ceremony.
  • This is an example (which is dull).
  • ..., these or those it is usual to use 'which'.
ID: COMMA_WHICH [1]
Version: 6.8-SNAPSHOT (2025-10-29 22:33:07 +0100)