International SEO Keyword Research: The Complete Step-by-Step Guide (2026)

Most businesses entering global markets make the same expensive mistake: they take their existing keywords, run them through a translation tool, and call it international SEO keyword research. Pages go live. Rankings don't follow. Budgets get wasted. The problem is not effort. It is the approach.  

International SEO keyword research is not a translation exercise. It is a market research exercise that happens to involve search terms. It requires understanding how people in a specific country think about a problem, what words they use to describe it, which search engines they actually use, and what content format they expect to find when they search.  

In 2026, this process will become more complex and more valuable. Google AI Overviews now surface answers for commercial queries across 40+ languages. ChatGPT and Perplexity are being used by buyers in different countries to research products before clicking a single link. If your keyword strategy was built for one market and translated for another, you are not competing in those markets.  

What Is International SEO Keyword Research?

International SEO keyword research is the process of identifying the exact words and phrases that real people in specific countries or language markets type into search engines when looking for your product, service, or content.

It is original, country-level research that begins from scratch for each target market, accounts for local vocabulary and dialect, and validates intent against the actual SERP results in that country.  

How to Research International SEO Keywords in 2026

Here’s the complete step by step approach to international seo keyword research to build keyword strategies that drive rankings and revenue across multiple markets. 

Step 1: Define target markets and languages 

This market selection step is what professional global SEO company engagements begin with  because the best keywords in the wrong market generate zero return.

Start by identifying which countries you want to target and confirming the primary language spoken in each. Different countries that speak the same language often use different words and search terms. For example, Spanish in Mexico is different from Spanish in Spain, and Brazilian Portuguese is different from Portuguese used in Portugal. Focus on the countries that offer the best business opportunities, show strong customer interest, and match your ability to create content tailored to local audiences. 

Entering too many markets at once dilutes effort and delays results. A focused launch in two or three high-potential markets consistently outperforms a broad, under-resourced rollout across ten. 

This market selection step is what professional global SEO company engagements begin with  because the best keywords in the wrong market generate zero return.

Step 2: Study local competitors 

Your home-market competitors are almost certainly not your competitors in Germany, Brazil, or Australia. The competitive landscape shifts entirely when you change countries  and your keyword strategy must reflect that shift.

• Switch your keyword tool to the target country and identify who is actually ranking for your target queries in that market  not globally.

• Run a Keyword Gap analysis: enter your domain and 2–4 local competitors, set the country, and surface keywords they rank for that you don't.

• Look at which content formats dominate the local SERP. If the top 5 results in Germany are long-form guides, a product page will not compete.

• Identify keywords where competitors rank weakly (positions 4–15)  these are your fastest entry points.

According to Ahrefs data, aggregate metrics mask zero-volume realities in 60% of individual country markets, making country-level competitor analysis essential before targeting any international keyword.  

Step 3: Find Out Which Search Engine Your Target Market Actually Uses

Before researching keywords, confirm which search engine your target audience uses. This single check can change every tool decision and content strategy that follows. 

Step 4: Research Keywords in the Local Language

Once you know your market and search engine, begin keyword research in the local language not in English. This is where most campaigns go wrong. 

The right process:

• Set your keyword tool (Semrush or Ahrefs) to your target country and language before entering any query.

• Enter seed keywords in the local language. Use a native speaker, a local SEO consultant, or AI tools to generate starting terms then validate them in your research tool.

• Look at search volume, keyword difficulty, and CPC per country. Do not use aggregated global numbers  filter strictly by country.

• Check local forums, Q&A platforms, and industry communities in that language to see how people naturally phrase questions about your product or service. Tools show you data. Native communities show you vocabulary.

Example: A UK retailer selling jumpers who only optimizes for "sweaters" captures US demand but remains invisible to UK audiences searching for their local term. Same product, same intent, completely different keyword  and different ranking potential. 

For ecommerce SEO specifically, this step is even more critical. Product names, category terms, and buying-intent phrases vary significantly between markets that share the same language  let alone markets that don't.  

Step 5: Localize Your Keywords  

Localization adapts your keywords to match how people in that specific market actually search, regional vocabulary, cultural context, and phrasing patterns. Translation gives you words. Localization gives you keywords people actually type.  

Where translation breaks down: 

Dialect differences within the same language

"SEO optimisation" versus "SEO optimization." "Digital programme" versus "digital program." In English-speaking markets alone  UK, US, Australia, Canada  localization is required even without language change. The same pattern applies across Spanish, French, Portuguese, and Arabic markets, where regional vocabulary differences are even more pronounced. 

Terms that don't exist in certain markets

In Germany, projector translates to both "projektor" and "beamer"  but only "beamer" reflects what Germans actually search for. The technically accurate translation has negligible search volume. Only native market knowledge catches this.  

Intent that shifts across markets

The same keyword can signal informational intent in one country and transactional intent in another. A phrase that brings researchers to your blog in the US may bring buyers ready to convert in Germany. Your content format, page structure, and CTA must match the local intent, not just the local language. 

This level of market-specific expertise is one of the core reasons brands partner with specialist international SEO company teams rather than trying to manage localization with in-house generalist SEOs. 

Step 6: Check local keyword volume and difficulty

Once you have your localised keywords, check their performance in the specific country you are targeting, not worldwide. Global search data can be misleading. For example, a keyword may get 50,000 searches per month globally but fewer than 500 searches in your target country.

For each keyword, check:

• Search volume in the target country: Set your keyword research tool to the target country and review local search volume. Ignore keywords with very low local demand, even if they have high global search numbers.

• Keyword Difficulty (KD): Measure how hard it is to rank for the keyword in that country. Many non-English markets have lower competition than English-speaking markets, creating good ranking opportunities.

• Cost-Per-Click (CPC): A lower CPC often means fewer advertisers are competing for the keyword. This can also indicate lower organic competition and make it easier to rank.

Use tools like Semrush or Ahrefs and select the database for your target country before analysing keywords. Always perform this check after localisation, as search volume and competition levels can be very different from the original English keyword.

Step 7: Evaluate Keyword Viability and Search Intent

After localization, re-run your keywords through your keyword research tool and validate them from two angles: viability and intent. 

Viability checks:

• Does the localized keyword have meaningful search volume in your target country? High-volume English keywords often have a fraction of that volume in other markets.

• What is the keyword difficulty score in that country? Non-English keywords frequently have substantially lower difficulty, a real competitive advantage for international campaigns.

• Is the CPC reasonable? Low CPC in a market often signals lower commercial competition  which correlates with easier organic ranking opportunities.  

Intent checks:

• Manually check the live SERP for this keyword in your target country (use a VPN or the country-specific Google domain). What types of pages are ranking  articles, product pages, comparison tools, or local directories?

• Match your content format to what the market already expects. A mismatch between your content type and the established SERP format is one of the most common reasons technically sound international pages fail to rank.

Keyword research is not a one-time task. Seasonal variations differ between markets; summer in Australia is winter in the UK. Regional holidays change search patterns. Build quarterly review cycles into your international SEO process.

Step 8: Create Keyword Mapping and URL Structure

Once your keywords are validated, map them to specific URLs using a structured approach. This is the point where keyword research connects to technical architecture  and where most international campaigns either succeed or fall apart. 

International SEO checklist for keyword mapping and URL structure: 

• Choose your URL architecture: Subdirectory (yoursite.com/de/) for most businesses consolidates domain authority. Subdomain (de.yoursite.com) for server flexibility. ccTLD (yoursite.de) for strongest geo-signal but highest operational complexity.

• Map each keyword cluster to a dedicated URL: One country, one language, one page per primary keyword cluster  no overlap between markets.

• Set up Google Search Console country targeting: Create separate properties per country domain or subdirectory and configure geo-targeting per property.

• Build country-specific XML sitemaps: One sitemap per country, submitted to the correct Search Console property.

• Plan canonical tags: Ensure no cross-country duplicate content signals  UK and Australian versions of the same service page must have canonical tags pointing to themselves, not to each other.

International Keyword Research Vs Domestic Research  

1. Different audiences use entirely different vocabularies

Even within the same language, words shift. UK users search for "jumpers" while US users search for "sweaters." Spanish speakers in Spain say "ordenador" while those in Mexico say "computadora." In Germany, locals call a projector a "beamer"  ; the technically correct translation "projektor" barely exists in search data. These are not small nuances, they are the difference between ranking and being invisible.  

2. Google is not the only search engine that matters

Around 70% of Chinese internet users search on Baidu. South Korea's search landscape is dominated by Naver. Nearly half of Russian internet users prefer Yandex. Each platform has different ranking signals, different keyword databases, and different content expectations. Researching keywords on Google for a market that uses Baidu produces data that is almost entirely irrelevant.  

3. Non-English keywords are a significant ranking opportunity

English is the internet's most competitive language. Non-English keywords typically carry much lower keyword difficulty scores and lower CPC rates  but comparable search volumes. A French-language keyword targeting the same intent as a high-competition English term may be far easier to rank for, and just as commercially valuable. According to Semrush, literal translations cause up to a 55% drop in organic click-through rates, confirming that vocabulary mismatches have a direct, measurable impact on performance.

International SEO Keyword Research Free Tools in 2026

The right tool depends on your target market, your budget, and which search engines matter for your audience. Here is what professional SEO teams use in practice:  

Google Keyword Planner - Best Free Option for Google Searches

Google Keyword Planner is the most reliable free starting point for international SEO keyword research in any market where Google is the dominant search engine. It allows you to set a specific country and language, returns local search volume data directly from Google's own index, and includes up to 12 months of historical search trend data  all at no cost with a Google Ads account. 

How to use it for international research:

• Log in to Google Ads and open Keyword Planner.

• Select "Discover new keywords" and enter your seed term  in the local language, not in English.

• Set the location to your target country and the language to the local language.

• Review monthly search volume ranges and competition levels. Export the list and validate in Semrush or Ahrefs for difficulty scores.

Limitation: Google Keyword Planner does not show keyword difficulty, competitor rankings, or SERP analysis. It is a starting point, not a complete research solution.  

Semrush- Best for Comprehensive Country-Level Research

Semrush is the most widely used tool for international SEO keyword research, with a database covering over 25.7 billion keywords across locations worldwide. For international research, always set your target country and language before running any query. This returns country-specific volume, difficulty, and CPC rather than aggregated global numbers that often misrepresent individual market performance.

Most valuable features for international campaigns:

• Country and language filter applied simultaneously across all keyword queries.

• The Keyword Gap tool  enters your domain alongside 2–4 local competitors and identifies keywords they rank for in a specific country that you don't.

• Position Tracking per country  monitors your keyword rankings segmented by market, not combined into a global aggregate.

• Semrush also offers a Semrush SEO course and Semrush SEO certification through Semrush Academy  useful for teams building in-house international SEO competence alongside tool usage. 

Pricing: Free for up to 10 queries per day. From $139.95/month for the Pro plan. External link: semrush.com 

Ahrefs- Best for Competitor Keyword Analysis 

Ahrefs indexes keywords in 217 locations and provides data for 10 search engines including Yandex and Baidu making it uniquely valuable for markets where Google is not the dominant platform. Its Keywords Explorer allows you to enter terms in any language and see popularity across all regions where that language is spoken, including cross-regional comparison. 

Most valuable features for international campaigns:

• Country-level backlink analysis  critical for understanding where international link building gaps exist.

• Content Gap tool per country  compares your organic coverage against local competitors in a specific market.

• Interface available in 13 languages, reducing the tool barrier for non-English speaking team members. 

Pricing: From approximately $129/month for the Lite plan. External link: ahrefs.com  

Moz- Best for End-to-End SEO with Link Building Integration

Moz provides a solid keyword database with country and language filtering, a link explorer for identifying international backlink opportunities, and a website crawl tool for auditing technical SEO issues across international site variants. It is designed for teams that want an end-to-end SEO platform rather than a specialist keyword research tool.

Pricing: From $49/month for the Starter plan. External link: moz.com 

AI Tools-  Best for Local Keyword Brainstorming Across Any Market

ChatGPT, Perplexity, and similar AI tools have become genuinely useful in 2026 as a starting point for international keyword brainstorming  particularly for markets or languages with limited keyword tool data coverage. Use them to generate local vocabulary variations, question-format queries, and cultural phrasing patterns, then validate every suggestion in Semrush or Ahrefs before building content. 

Example prompt: "What questions do Brazilian consumers typically ask when researching [your product category] online? List them in Portuguese, using vocabulary common in São Paulo." 

AI tools do not replace research tools. They accelerate the brainstorming stage  particularly in markets where your team has limited native language knowledge.

Why International SEO Keyword Research Matters in 2026

The case for investing in proper international keyword research has grown stronger every year  and 2026 has raised the stakes significantly:  

• Over 5.4 billion people are online globally. The vast majority do not search in English.

• The Asia-Pacific region is growing at a 13.5% CAGR, generating enormous new search demand across multiple languages.

• Zero-click searches now affect over 58% of all Google queries, meaning keywords must be positioned for featured snippets and AI Overviews, not just traditional blue links.

• AI Overviews now appear for commercial queries in 40+ languages. If your content is not structured for local-language AI citation, you will not be surfaced  even if you rank.

• Ahrefs research shows that aggregate keyword metrics mask zero-volume realities in 60% of individual country markets. Without country-level filtering, you are making keyword decisions based on global numbers that do not apply to your actual target market.

• Businesses that localize content  not just translate it  see measurably higher conversion rates, not just more traffic.

The businesses winning global search today are those working with expert global SEO services that treat keyword research as a market entry tool  not a translation task. 

Common Mistakes in International SEO Keyword Research

Even experienced SEO teams make these errors when expanding internationally:  

Mistake 1: Translating keywords instead of researching them

Translation is a brainstorming input, not a research output. Semrush data confirms that literal translations cause a 55% drop in organic click-through rates. Always validate translated terms in country-specific keyword tools before building any content around them.  

Mistake 2: Using the wrong search engine's keyword data

Semrush and Ahrefs are primarily Google-centric. If your target market uses Baidu, Yandex, or Naver, the keyword data from Google-based tools is largely irrelevant for those markets. Use market-specific tools or partner with local SEO experts who have access to regional keyword data.  

Mistake 3: Treating a language as a single market

Spanish is not one market. It is Spain, Mexico, Argentina, Colombia, and 17 other countries  each with distinct vocabulary, search behavior, and competitive landscapes. A keyword strategy built for Spain will underperform in Mexico and may be nearly invisible in Argentina. Research each country separately.  

Mistake 4: Doing keyword research once and not revisiting it

Search trends shift seasonally  and season timing varies by market. Data from Google Analytics shows that regional holiday seasons cause search traffic swings of up to 70% year-over-year in some markets. Build quarterly keyword review cycles into your international SEO process. 

Mistake 5: Skipping hreflang after completing keyword mapping

Completed keyword research without correct hreflang implementation means your country-specific pages may compete against each other in search results, a problem known as keyword cannibalization. Every country keyword cluster must be connected to the right URL with proper hreflang tags. 

Mistake 6: Ignoring AI search query formats

According to Moz's 2025 State of SEO report, 62% of queries that trigger AI Overviews have a monthly search volume under 100 in traditional keyword tools. These conversational, question-format queries are what AI systems are built to answer  and they are entirely invisible to volume-led keyword research. Failing to include question-based and long-tail intent keywords in your international content clusters is a 2026 blind spot that competitors with better AI search optimization will exploit.  

International SEO Keyword Research and AI Search in 2026

In 2026, the rise of AI-generated search results has permanently changed what effective keyword research looks like and international campaigns are affected most.  

Google AI Overviews now appear for 15–20% of all queries globally, with that figure rising across major English and non-English markets simultaneously. With 8.4 billion active voice assistants worldwide, conversational and long-tail queries are growing in volume and commercial significance  particularly in markets where voice search adoption is high.  

For any international SEO optimization follow these AI search considerations::

• Include question-format keywords in every market: "How," "What," "Why," and "Which" queries are what AI systems are designed to answer. Include them in your keyword clusters alongside head terms. They typically carry lower keyword difficulty and directly feed AI Overview visibility.

• Structure content for AI citation  answer-first formatting: Every page targeting a query where AI Overviews may appear needs a direct 50–100 word answer in the opening paragraph. AI systems pull the first extractable answer. If your answer is in paragraph six, you will not be cited even if you rank first organically.

• Research PAA questions per country, not just per keyword: People Also Ask questions differ by country even for identical primary keywords. Google UK surfaces different PAA questions than Google Australia for the same search term. Research these per market and use them as H3 subheadings within your content.

• Build keyword clusters, not keyword lists: AI retrieval systems evaluate topical depth, not individual page optimization. One page should target a cluster of semantically related queries in each language. This is how Google AI Overviews, ChatGPT, and Perplexity assess whether a source is worth citing.  

For a complete breakdown of how AI Overviews, LLM citation optimization, and structured data interact with international keyword performance, see 10 Essential International SEO Services Every Global Business Needs. 

Build an International SEO Keyword Strategy That Ranks in Every Market

International SEO keyword research is the foundation on which every other element of a global search strategy rests. Build a complete international seo framework with country-level research, genuine localization, competitor gap analysis, hreflang mapping, and AI search coverage  and you open markets that your competitors have not yet reached, ranking for keywords that are measurably easier to win than their English-language equivalents.  

Build it by translating your existing keyword list and calling it done, and all the technical work, content investment, and link building that follows will produce results far below their potential.  

The difference between international SEO that compounds over time and international SEO that stalls after a few months comes down to the quality of the keyword research process that everything else is built on.  

Ready to get your international keyword strategy right from the start?  

Devoptiv's international SEO services cover the complete process  from country-level keyword research and localization strategy to hreflang implementation, international content clusters, and AI Overview optimization  across the UK, USA, Canada, Australia, and beyond. 

→ Get Your Free International SEO Audit