Multilingual WordPress Without Losing London Search Rankings

Not if implemented correctly — but the risk is real. Poorly configured multilingual setups introduce duplicate content signals and hreflang errors that Google penalises. When done properly, with correct hreflang tags, language-specific XML sitemaps, and canonical directives, adding a second language should either maintain or improve your organic footprint by opening new keyword territory. The danger window is the implementation phase itself, which is why having an SEO audit running before and after the go-live is essential for any London business protecting existing rankings.

For most London SMEs and agencies, subdirectories perform better in practice because they inherit the domain authority of the root domain rather than starting from scratch as subdomains do. Google officially states both are treated equally, but the crawl budget allocation and link equity flow through subdirectories more reliably for sites under 100,000 pages. Subdomains make sense if you need to serve distinctly different audiences in different countries with separate hosting infrastructure — for example, a French-language e-commerce store with separate stock and pricing from your UK operation.

Auto-translated content can be indexed and can rank, but it almost never outperforms human-edited translation in competitive niches. Google's quality assessor guidelines explicitly flag thin, machine-translated content as a quality issue. More importantly, auto-translated WordPress pages often inherit identical meta titles and descriptions from the source language, which creates direct duplicate-content conflicts before the page content is even evaluated. For London businesses targeting high-value international keywords, auto-translation should be treated as a first draft that requires human review and unique meta data before being set to public and indexable.

WPML's default installation creates translated URL slugs and registers them as indexable immediately, before any hreflang tags are configured. In that gap — sometimes just 48 hours — Googlebot crawls the new URLs, sees near-identical content to your English pages, and applies a soft duplicate-content filter. Simultaneously, the absence of hreflang means Google cannot distinguish which version should rank for which audience. The combination causes a temporary or, if uncorrected, permanent rankings dip. The fix requires configuring WPML's SEO settings, connecting it to your sitemap plugin, and submitting the corrected sitemaps to Search Console.

Run three free checks: one, use the Hreflang Tag Checker Chrome extension on your translated homepage and confirm all language variants are listed with matching return tags. Two, in Google Search Console open the Coverage report and filter by each language sitemap — any 'Excluded' URLs are being suppressed. Three, search Google for your exact page title in quotes — if both the English and translated versions appear as separate results, your canonicalisation is likely broken. If any of these checks return problems, you have enough evidence to justify a professional audit before the situation deteriorates further.