How do you set locale on AI Overviews?

Country and language parameters on the SERP request plus residential egress in that country. Both, always.

How different are markets in practice?

Substantially. Domain sets diverge sharply once you leave English, and local publishers dominate in ways the global average hides.

Google AI Overviews locale variance tracking

google_ai_overviewslocale_varianceAnonymous

AI Overviews is live in 200+ countries and 40+ languages, and it disagrees with itself across them. We collect the same prompt through residential egress in each target market with gl and hl set explicitly.

How it renders

Collected by repeating the prompt per market with country and language parameters.

Sampling

Each locale is its own sample set. A cross-market comparison at n=30 per market costs what it says on the tin, which is why we surface the arithmetic before you commit.

Gotcha

Setting hl without egressing from the country produces a hybrid result that matches no real user. Both have to change together, which is why locale coverage costs more than a language toggle would suggest.

What the API returns

A single collection call against Google AI Overviews for the locale variance field, sampled n times and returned as one object per prompt.

{
  "engine": "google_ai_overviews",
  "field": "locale_variance",
  "prompt": "best ai visibility tracking tool",
  "country": "GB",
  "language": "en",
  "n": 30,
  "locales": [
    {
      "country": "GB",
      "language": "en",
      "share": 0.34,
      "divergence": 0.02,
      "unique_domains": 4
    },
    {
      "country": "DE",
      "language": "de",
      "share": 0.19,
      "divergence": 0.15,
      "unique_domains": 11
    }
  ]
}

GET /v1/collect?engine=google_ai_overviews&field=locale_variance

Response fields

Key	Type	Notes
country	string	ISO 3166-1 alpha-2 country of the egress used.
language	string	ISO 639-1 language the prompt was issued in.
share	float	Brand share within that locale.
divergence	float	Distance from the global mean for this prompt.
unique_domains	integer	Domains cited in this locale and nowhere else.

What it costs

Each locale multiplies the collection count. Two markets at n=30 is 60 credits per prompt.

See credit pricing →

Google AI Overviews locale variance FAQ

How do you set locale on AI Overviews?: Country and language parameters on the SERP request plus residential egress in that country. Both, always.
How different are markets in practice?: Substantially. Domain sets diverge sharply once you leave English, and local publishers dominate in ways the global average hides.

Get country-level AI Overview data that a local team will recognise

Tell us your markets and we'll price per-locale collection across your prompt set.

Other Google AI Overviews data

Citations Brand mentions Sources Answer text Share of voice Sentiment Prompt volatility Position

Across every engine

Compare how locale variance behaves on every engine we track.

Locale variance across all engines →