Language criterion audit (GAQL), with the label rule

-- Google Ads Query Language: every campaign-level language criterion, with the campaign
-- it sits on, so each row can be labelled after the late-September 2026 change.
-- campaign and language_constant are attributed resources of campaign_criterion,
-- so their fields may be selected alongside it.
SELECT
  campaign.id,
  campaign.name,
  campaign.advertising_channel_type,
  campaign.advertising_channel_sub_type,
  campaign.status,
  campaign_criterion.criterion_id,
  campaign_criterion.status,
  campaign_criterion.negative,
  campaign_criterion.language.language_constant,
  language_constant.code,
  language_constant.name
FROM campaign_criterion
WHERE campaign_criterion.type = 'LANGUAGE'
  AND campaign.status != 'REMOVED'
ORDER BY campaign.advertising_channel_type, campaign.name

-- Label each row from campaign.advertising_channel_type:
--   SEARCH            -> INERT.   The setting no longer targets. Writes to
--                                 CampaignCriterion.language return
--                                 ContextError.OPERATION_NOT_PERMITTED_FOR_CONTEXT.
--   PERFORMANCE_MAX   -> PARTIAL. Dead on the Google Search Network, live on YouTube,
--                                 Display, Discover and Gmail. Shopping ads inside
--                                 Performance Max are not governed by it. Writes
--                                 still succeed, so nothing tells you it half-applies.
--   DISPLAY / VIDEO / DEMAND_GEN -> LIVE. Unchanged.
--
-- Keep this snapshot. After the change it is the only record of what you asked for.
-- Do not report a language dimension from this table for SEARCH rows. The signal that
-- decides delivery is the language of the ad and the landing page, and it has no field
-- in the API: there is no segments.language, and no language attribute on ad_group_ad
-- or on a text asset. The one language field left in reporting is segments.product_language,
-- which comes from the product feed.