The short answer
Because translation is about people, not only about institutions. There is a language an international community has used for over a century: it has its own congresses, publishers, libraries, correspondence and thousands of people who work in it. That no state keeps official records in it does not make it less alive.
And because it is the most honest test an agency can set itself. Every second visitor will check the English version of a site. Almost nobody checks the Esperanto one. Keeping it complete, rather than a welcome paragraph, only makes sense if you genuinely command the language.
What that means in practice
Every page of our site exists in three languages: Ukrainian, English and Esperanto. Not the home page and contacts, but all of it — services, industries, pricing, articles.
We support Esperanto by choice. The language was created so that people from different countries could speak to one another as equals, and for more than a century the idea has been working: there is a community, there are congresses, there are books and letters. A full version of our site in Esperanto is our own small share in that same work. One more place on the internet where an Esperanto speaker finds a real text rather than a welcome paragraph makes the world a little better, and we are glad to add it.
Vadym Kasian, the director of TRIS, speaks Esperanto and uses it with pleasure. So the full version of the site is not a decision taken at a distance, but a continuation of something the company already has.
There is a practical side too: congress material, correspondence with organisations, articles from Esperanto publications, website localisation. A small direction, but a real one.
Why this matters for your order
An approach that serves a rare language as carefully as English shows up in the rest of the work. It is what makes us ask not “which language” but “where are you submitting”, reconcile name spelling across a whole file rather than document by document, and tell a client they do not need an apostille when they genuinely do not.
An agency that treats languages as a commodity works differently. We think the difference shows in exactly these small things, and Esperanto is the cheapest way to demonstrate it.