Cardiff is officially a bilingual city. Welsh and English are both recognised languages of Wales. That is genuinely meaningful for some businesses here. For others, it is not especially relevant to how they show up in search. The honest answer to whether you need a bilingual SEO strategy is: it depends. But it is worth thinking through properly.
Who actually searches in Welsh?
About 29% of Cardiff residents have some level of Welsh language ability. Roughly 11% of Wales as a whole are fluent Welsh speakers. In search volume terms, Welsh-language queries are a small fraction of their English equivalents for most commercial topics.
That does not make them irrelevant. Welsh speakers cluster in specific communities, sectors, and demographics. For those businesses, Welsh-language searches represent real potential customers they are currently invisible to.
Where bilingual SEO actually makes sense in Cardiff
There are some sectors where this is a genuine priority rather than a nice-to-have.
- Public sector and Welsh Government-funded organisations: many have legal obligations under Welsh Language Standards. A bilingual web presence is often a compliance requirement, not just an SEO choice.
- Education providers: schools, colleges, and universities serving Welsh-medium communities have students who prefer Welsh-language content and search in Welsh.
- Healthcare and social care: Welsh-speaking patients have a legal right to services in Welsh. Providers who make this visible in search build stronger trust with this audience.
- Legal and professional services: firms offering Welsh-language services in family law, employment, or public sector work are serving a distinct market with real search demand.
- Cultural organisations: festivals, arts venues, and organisations with Welsh-language programming need to reach Welsh-speaking audiences, and search is part of how they do that.
The technical bit worth knowing
If you do invest in Welsh-language content, the technical implementation matters more than most people realise.
The standard approach for multilingual websites involves hreflang tags, which tell Google which version of a page to show to which user based on their location or language settings. This works well for international sites. It does not translate cleanly to Wales, because Welsh and English speakers are often in the same postcode. Location-based targeting is not accurate enough at that scale.
More practically: do not machine-translate your English content into Welsh and publish it. Welsh translation quality from AI tools is improving but it is not reliable enough. Content that reads awkwardly in Welsh will undermine your credibility with the audience you are trying to reach. Human translation, or at minimum expert review, is worth the cost.
What if bilingual SEO is not relevant to my Cardiff business?
For most Cardiff businesses, the honest answer is that Welsh-language SEO is not a priority. If you serve a predominantly English-speaking commercial client base, your budget is better spent elsewhere, usually on core local SEO and your Google Business Profile.
That said, there is a small thing worth doing even then. A single line on your About page or in your footer noting that you are happy to communicate in Welsh signals cultural awareness. It costs almost nothing and it is a small, genuine trust signal for any Welsh-speaking visitor who lands on your site.
The bigger Cardiff SEO picture
Bilingual SEO is a niche consideration for most Cardiff businesses. The things that move the needle for the majority are more straightforward: getting your technical foundations right, your Google Business Profile in order, your service pages specific enough to rank, and your content good enough to be trusted.
The area where Cardiff businesses have the biggest untapped opportunity right now is AI search. Google's AI Overviews and tools like ChatGPT are increasingly part of how people find businesses. Almost no Cardiff SEO agency is helping local businesses appear in those results in any deliberate way. That is a gap worth taking seriously, and it is at the heart of what the industry now calls Generative Engine Optimisation.