The interface speaks Slovak

969 strings, an instance default and a per-person choice, and no half-done corner:
the admin prose is translated too. Design and reasoning: LLeMbas.wiki/Translations.

KEYED BY THE ENGLISH SENTENCE

A missing entry renders the key, which is the English -- so an untranslated string
looks as it always did, an English instance is byte-for-byte 1.6.0, and a
half-finished catalogue is a half-translated page rather than a page of dotted key
names. The cost is that editing an English sentence orphans its translation
silently, which is what tests/test_translations.py asserts in both directions.

No gettext: .po -> .mo is a build step and this project does not have one.

A JINJA GLOBAL, AND THEREFORE A CONTEXTVAR

`t()` is a global for the reason `brand` already documents -- render() is bypassed
by 25 TemplateResponse calls and 8 get_template().render() calls, the latter being
the SSE frames, which have no Request at all. A global is bound once at import and
the language is per person, so the active language is a ContextVar set per request.

🚨 `get_current_user` had to become `async def`. FastAPI runs a sync dependency in a
threadpool, and anyio copies the context in and discards it on the way out -- so
the language was set where nothing could see it and every page rendered in the
instance's language whatever anybody had chosen, with no error anywhere.

NOT TRANSLATED, ON PURPOSE

Everything a model reads: the 60 prompt fragments, and the dates in harness.py,
schedule/runner.py and schedule/compile.py. Only `i18n.stamp` is localised, and
only where a person reads it -- with the *format* translatable as well as the
words, because "26. septembra 2026" is a different pattern rather than the same one
with different words in it. A process locale is not an option: global, not
thread-safe, two people's pages at once.

A second fragment telling models to answer in the reader's language was written
during this work and removed: `core.style` has said it since long before, and
test_an_empty_override_turns_a_fragment_off caught the duplicate.

THE BULK PASS

1213 sites wrapped by a one-off script that only touched patterns it could not
misread. It got three wrong in a way that mattered -- `t('…')` inside `attr="…"`
where the sentence held an apostrophe, closing the Jinja string and 500ing two
pages whose partials no test renders. tests/test_translations.py now compiles all
110 templates. It also wrapped the product's own name, an SSH key header, a
keystroke hint and an example URL, all taken back out: a string is not
translatable just because it is a string.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/lembas/web/templates/auth/register.html

@@ -10,11 +10,9 @@
       {{ mark(cls="brand-mark", uid="auth") }}
       <h1 class="auth__title">{{ wordmark() }}</h1>
       {% if first_run %}
-      <p class="auth__subtitle">
-        Nobody has claimed this instance yet. The first account becomes its administrator.
-      </p>
+      <p class="auth__subtitle">{{ t("Nobody has claimed this instance yet. The first account becomes its administrator.") }}</p>
       {% else %}
-      <p class="auth__subtitle">Create your account.</p>
+      <p class="auth__subtitle">{{ t("Create your account.") }}</p>
       {% endif %}
     </div>
 
@@ -27,22 +25,22 @@
 
     <form method="post" action="/auth/register" class="stack">
       <div class="field">
-        <label class="field__label" for="name">Name</label>
+        <label class="field__label" for="name">{{ t("Name") }}</label>
         <input class="input" type="text" id="name" name="name" required autofocus
                autocomplete="name" value="{{ name|default('') }}">
       </div>
 
       <div class="field">
-        <label class="field__label" for="email">Email</label>
+        <label class="field__label" for="email">{{ t("Email") }}</label>
         <input class="input" type="email" id="email" name="email" required
                autocomplete="username" value="{{ email|default('') }}">
       </div>
 
       <div class="field">
-        <label class="field__label" for="password">Password</label>
+        <label class="field__label" for="password">{{ t("Password") }}</label>
         <input class="input" type="password" id="password" name="password" required
                autocomplete="new-password" minlength="8">
-        <p class="field__hint">At least 8 characters.</p>
+        <p class="field__hint">{{ t("At least 8 characters.") }}</p>
       </div>
 
       <button class="btn btn--primary btn--block" type="submit">