FRENCH LOCALIZATION & AI EXPERTISE

Your brand, but en français.

Your French content should feel like it was created for France, not simply translated into French.

I'm Harmonie Blondel Henderson, an independent French localization specialist helping international brands adapt their UX, marketing, CRM and SEO content for French audiences.

Whether your content starts with a human, a translation tool or generative AI, I make sure the final result sounds natural, stays true to your brand and meets your quality standards.
Let's talk about your French content
Trusted by Vinted, Tourlane and Malt
Excellent - 90+ reviews
French Localization & AI Specialist
English & Spanish → French
10+ years of experience

Accurate French isn't always good French.

Your copy can be grammatically correct and still sound completely off.

A clunky CTA. A product notification that feels robotic. An AI-generated SEO description that doesn't quite make sense.

These details might seem small. But when they're repeated across hundreds or thousands of customer interactions, they can seriously affect how your brand comes across.

I look beyond the words to make sure your French content:

  • Sounds natural to native French speakers.

  • Reflects your brand voice across every channel.

  • Uses consistent terminology, from your app to your marketing campaigns.

  • Avoids literal translations, awkward wording and AI-generated inconsistencies.

  • Meets your linguistic quality standards, even at scale.

Get started in France now

One French specialist. Full accountability.

No endless handovers. No explaining your brand guidelines from scratch every time.

When we work together, you deal directly with the person who knows your French content inside out.

I work closely with localization, product and marketing teams, often over several years. I get to know your brand, your tools and your processes so that every new project builds on what we've already achieved.

And if you need extra expertise or additional capacity, I can call on a network of trusted language professionals.

Your brand voice, unmistakably French.

Your customers should recognize your brand, whatever the language or channel.

That means getting more than the terminology right. It's about knowing when to be playful, when to keep things simple and how to make every message feel natural in French.

From UX microcopy to CRM emails and advertising campaigns, I help keep your voice consistent across the entire customer journey.

And when your content grows, style guides and glossaries make sure that consistency grows with it.

The right workflowfor every project.

Not every project needs the same approach. A TV campaign, an app interface and 100,000 SEO descriptions come with very different challenges.

Sometimes, the best solution is hands-on localization. Sometimes, AI can help generate content at scale, provided the right prompts, guidelines and quality checks are in place.

I bring the linguistic expertise and practical experience to help choose the right approach, catch what automated workflows miss and keep your French content consistent.

The tools can change. The quality standards shouldn't.

French content, whatever the touchpoint.

Product & UX 
Localization

From app interfaces and onboarding flows to notifications and help centers, I make your French user experience feel intuitive, natural and unmistakably on-brand.

Marketing, CRM & Advertising

Emails, newsletters, landing pages, social media and ad campaigns. I adapt your message to French audiences without losing the personality, creativity or impact of your brand.

E-commerce & SEO Localization

Product listings, category pages, meta titles and descriptions, including large-scale content projects. I keep your French copy clear, consistent and relevant, even across thousands of assets.

AI-Powered Workflows & Linguistic QA

From prompt design and terminology guidelines to quality checks on AI-generated content, I combine smart workflows with human linguistic expertise to maintain consistent, natural French at scale.

Whether it's a single campaign, an app interface or thousands of AI-generated SEO descriptions, your French content deserves the same attention to detail.
Let's talk about your French content →

I don't like to toot my own horn, but I'm happy to let my customers do it!

Join the chorus!

How to get started (Don't worry, it's easy):

1
TELL ME ABOUT YOUR PROJECT.
What are you working on? Tell me about your content, goals, deadlines and any challenges you're facing.
2
LET'S DISCUSS YOUR NEEDS;
I'll review your request and we'll talk through the scope, expectations and best approach. And if I'm not the right person for the job, I'll point you towards someone who is.
3
GET A TAILORED PROPOSAL.
You'll receive a clear proposal covering the work involved, timeline and costs. No unpleasant surprises.
4
GIVE ME THE GREEN LIGHT.
Happy with everything? Great! Once we're aligned, we can get started.
5
LET'S MAKE GREAT FRENCH CONTENT HAPPEN.
I'll get to work, keeping communication straightforward and quality at the heart of everything. And hopefully, this will be the start of a long-term collaboration!
Get started

Your questions, my answers. ✍🏼

I specialize in translating and localizing content from English and Spanish into French, my native language. If you need other language combinations, I can recommend trusted colleagues.
I work with international brands on product and UX content, marketing and CRM communications, advertising, e-commerce, SEO and AI-generated French content. From a single campaign to thousands of content assets, each project comes with its own challenges.
Absolutely! I use AI when it makes sense for the project, from designing prompts and workflows to setting linguistic guidelines and checking generated content for accuracy, consistency and natural French.

But AI isn't always the answer. My job is to find the right approach, not to use technology for the sake of it.
It starts with understanding your brand, audience and expectations. I use terminology resources, style guides, localization tools and linguistic QA processes to make sure your content is accurate, natural and consistent.

The exact process depends on the project and the type of content involved.
Of course! I can help create and maintain French style guides, glossaries and editorial guidelines so your brand sounds like itself across every channel, even when multiple people or tools are involved.
Yes! I'm used to working closely with international teams on recurring projects, large content volumes and long-term collaborations. We can discuss the right workflow and capacity for your needs.

Ready to make your French content feel right?

Let's talk about your project →
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