Starting late September, Google will eliminate campaign-level language targeting from Search and AI Max for Search campaigns. Instead of advertisers selecting target languages explicitly, Google will determine ad eligibility based on the language of the ad creative itself, combined with AI-derived signals about what languages a given user understands. If you run multilingual campaigns or manage accounts programmatically, this requires action before the cutoff.

What Google is changing

This is not a soft deprecation. The setting disappears. Per Search Engine Land, attempts to set CampaignCriterion.language via the Google Ads API for Search campaigns will return a hard OPERATION_NOT_PERMITTED_FOR_CONTEXT error.

Performance Max gets a split treatment, as reported by both Search Engine Land and Search Engine Journal. For the Search inventory within PMax, language targeting stops working exactly like standard Search. For YouTube, Display, Discover, and Gmail placements, advertiser-selected language settings remain active. Shopping ads inside PMax are unaffected entirely.

How will Google choose which language ad to serve? Search Engine Journal explains that Google already reads query language, browser settings, and behavioral signals to infer what languages a user understands. If a user is bilingual in English and Spanish, ads in either language become eligible, and Google’s AI-based ad group prioritization decides which one wins. For brand-name queries that look identical across languages, Google says it will lean on the user’s preferred language signals.

Google’s official position, cited by Search Engine Journal: no campaign restructuring is required. Accounts already separated by language can stay separated. The ad and landing page language becomes the primary matching signal going forward.

One unresolved issue flagged during an advertiser roundtable covered by Search Engine Journal: regulated industries (insurance, financial services) that need to document equitable delivery across languages have no replacement reporting mechanism yet. Google acknowledged the concern but provided no additional language-level reporting.

What this means for your campaigns by business type

E-commerce (2-10K/month in ad spend)

If you run separate English and German campaigns for a European store, those campaigns can stay as-is. The creative language becomes the targeting signal. The real risk is Performance Max. Your PMax campaigns targeting Search inventory will now follow the same automated language logic. If your product feed or ad assets mix languages inconsistently, Google’s AI will make language matching decisions you did not explicitly authorize. CPA and ROAS volatility is most likely to appear in multilingual PMax setups in the first 4-6 weeks after rollout. Watch your search terms report for unexpected language bleed.

B2B manufacturing and equipment (1-5K/month)

Your campaigns typically run in one language targeting a narrow, high-intent keyword set. For you, this change is largely invisible. Single-language campaigns with consistent ad copy and landing pages will behave as before. The nuance: if you have been using language targeting as an extra layer of audience restriction (blocking non-native speakers to protect lead quality, for example), that layer disappears. With long deal cycles and expensive leads, even a 5-10% increase in irrelevant traffic can distort your CPL metrics for weeks. Monitor search terms and lead quality closely in October.

Local business and services (under 2K/month)

Most local campaigns run in one language, one geography. Per Search Engine Journal, Google itself says this change “shouldn’t require major changes” for straightforward setups. A single-language local campaign, a plumber in Warsaw or a dentist in Lyon, will likely notice nothing. The exception: local businesses in bilingual regions (Brussels, Montreal, border cities) who relied on language targeting to control which community they reached. For those accounts, ad copy and landing page language now carry the full targeting weight.

What to do before late September

1. Audit your ad creative and landing page language consistency.
Before late September, confirm that every ad group’s copy and its destination page are in the same language. Mixed signals (English ad, German landing page) will directly confuse Google’s matching logic.

2. Segment multilingual Performance Max asset groups by language.
If your PMax campaign serves multiple languages, separate asset groups by language with dedicated landing pages. This gives Google clean signals and protects your ability to diagnose performance by language.

3. Pull a baseline search terms report now.
Export your current search terms data segmented by campaign. After the rollout, compare the language distribution of queries. Unexpected shifts in query language mean the change is affecting your delivery.

4. Flag this to your compliance or legal team if you are in a regulated industry.
Search Engine Journal specifically noted that Google has not announced a replacement for language-level reporting. If your business needs to document ad delivery equity across languages, raise this internally before the setting disappears.

5. Stop sending language criteria in API integrations.
If you manage campaigns programmatically, update your scripts before late September. Per Search Engine Land, the API will return hard errors for any attempt to set language criteria on Search campaigns after the cutoff.

Frequently asked questions

Will my existing language-separated campaigns break after the change?
No. Google says accounts already structured by language can stay that way. The ad creative and landing page language become the primary targeting signals, so campaigns separated by language will continue to function, just without the explicit language criterion as a filter.

How does Google decide which language ad to show a bilingual user?
Google uses query language, browser settings, and behavioral signals to infer what languages a user understands. For a bilingual user, ads in either language become eligible, and Google’s AI determines which ad wins based on predicted relevance and performance signals.

Does this change affect Performance Max Shopping ads?
No. Shopping ads inside Performance Max are unaffected entirely. The change applies to Search inventory within PMax and to standard Search campaigns. YouTube, Display, Discover, and Gmail placements inside PMax also retain advertiser-selected language settings.

Work with us

If you are unsure how this change affects your specific account structure, I offer a focused campaign audit. I will review your language setup, PMax asset groups, and API integrations and give you a written action list before the September deadline. Fair trade: you get clarity, I get to show you what I actually do. [Book the audit here.]