The verdict in three sentences
For a mid-sized London audit firm that wants to win UK subsidiaries of continental European groups, a credible bilingual website costs, as a 2026 order of magnitude, 18,000 to 35,000 GBP ex VAT. Translation is not a detail: expect 0.10 to 0.15 GBP per word for a financial translator, and refuse unreviewed machine translation on pages about IFRS, FRS 102 or ISAs (UK). The project takes 9 to 12 weeks, with clean hreflang so each service page is found in the right language.
What a continental CFO looks for on your site
The finance director of a French or German group's UK subsidiary has to justify the choice of auditor to head office. They look for verifiable proof: registration as a statutory auditor with ICAEW or ACCA, membership of an international network, sector references, partner biographies and technical publications. If this exists only in English, the decision goes up to Paris or Munich without your arguments. The second language version must be complete, not a selection of three pages.
Budget for a bilingual audit firm website in London
| Item | 2026 range (GBP ex VAT) | Note |
|---|---|---|
| Discovery, positioning, structure | 1,500 to 3,000 | Workshops with partners |
| Custom design | 3,000 to 6,000 | Sober, readable, accessible |
| Build and bilingual CMS | 7,000 to 14,000 | Services, people, insights |
| English content writing | 2,500 to 5,000 | Services, sectors, case studies |
| Professional translation (EN to FR or DE) | 2,500 to 7,000 | 25,000 to 50,000 words |
| Technical SEO (hreflang, sitemaps) | 1,000 to 2,000 | Separate indexing per language |
| Hosting and monitoring | 500 to 1,200 per year | Certificate, backups |
London agencies typically charge around 700 GBP per day for senior profiles. A well-scoped project for a 40-person firm often lands around 24,000 to 28,000 GBP.
Hreflang and bilingual architecture
Each page needs two versions with distinct URLs, for example /en/services/statutory-audit and /fr/expertises/audit-legal, linked by hreflang tags. Without them, Google may show the English page to a CFO in Lyon, or ignore the French version altogether.
| Choice | Recommended option | Common mistake |
|---|---|---|
| URL structure | Subfolders /en/ and /fr/ | Unindexed ?lang=fr parameter |
| Hreflang tags | Reciprocal on every page | Homepage only |
| Language switcher | Goes to the equivalent page | Goes to the homepage |
| Titles and meta descriptions | Written per language | Copied from English |
| Technical insights | Translated or summarised | Missing in the second language |
| Contact form | Routed to the relevant partner | Single generic inbox |
ICAEW rules and confidentiality
ICAEW and FRC expectations require that promotional material is accurate, not misleading and does not disparage other firms. Audit independence also matters: be careful about client logos and anything that could suggest non-audit services to audit clients. Publish a named reference only with written client consent, and prefer anonymised cases ("UK subsidiary of a European industrial group, 1,200 staff"). Forms fall under UK GDPR: privacy notice, retention period, ICO registration.
Content that convinces head office
The pages that do the heavy lifting are rarely the homepage. Continental CFOs read partner profiles, sector pages and technical insights. Plan at least one sector page per target industry (manufacturing, logistics, technology, financial services), each with an anonymised case, the team involved and the standards applied. Publish one technical insight a month in both languages, for example on IFRS 18 or UK audit reform, signed by a partner. Over a year, those twelve articles in two languages become the strongest evidence of expertise on the site and the main entry point from search engines. Keep a light editorial calendar so the second language never falls behind.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Emma, partner at a 40-person audit firm in London, estimates that each new statutory audit engagement with a European subsidiary is worth an average 45,000 GBP in annual fees over a typical three-year relationship, so 135,000 GBP. The firm invests 26,000 GBP in a complete bilingual website. If the site helps win just one extra engagement per year, the investment is covered in the first year, with a multiplier of about 5 over three years.
FAQ
Can machine translation cut the budget?
It works as a first draft, but review by a financial translator is essential. Post-editing costs around 0.05 to 0.08 GBP per word instead of 0.10 to 0.15, for a publishable result.
Should we add German or Spanish?
It depends on your targets. Each added language costs roughly 25 to 35% of the initial content budget, and languages are set in the quote.
How do we show references without breaching confidentiality?
Through anonymised cases stating sector, size and type of engagement. A named reference requires written consent, ideally renewed every 2 to 3 years.
How fast will the second language be indexed?
With correct hreflang and submitted sitemaps, pages usually appear within 2 to 6 weeks. Ranking on competitive queries takes 4 to 8 months.
Does Kolonell build bilingual sites for professional firms?
Yes, for firms in Europe and Africa. Budget depends on page and content volume, it is priced on quote, and languages are set in the quote.
Let's scope your project. We structure your services, anonymised references and bilingual architecture with you, on a 9 to 12 week plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
