feat(i18n): serve every page in 30 languages

The interface ships translated; page content stays English until a
LibreTranslate instance fills app/i18n/content/ through make i18n. A string
without a catalogue entry falls back to its English source, so a half-filled
catalogue degrades instead of breaking.

Translation runs after ConfigurationResolver.resolve_links(), on a copy.
resolve_links matches by the `name` field, so translating it beforehand
would break every `link:` reference in the configuration.

negotiate() normalises to the primary subtag itself. Werkzeug's best_match
returns an exact match before it considers a primary-tag fallback, so the
Chrome default `de-DE,en;q=0.8` resolves to English there. "/" carries
Vary: Accept-Language, without which a shared cache pins the first
visitor's language for everyone.

The route rule lists the known codes as a converter argument. A bare
"/<lang>/" answers /robots.txt and /favicon.ico with a permanently
cacheable 308 to their trailing-slash form.

Templates gain lang, dir, the RTL stylesheet, a canonical URL and 30
hreflang alternates. Those are the first external URLs in this app:
ProxyFix takes the scheme from X-Forwarded-Proto so they do not claim
http:// behind a TLS-terminating proxy, X-Forwarded-Host stays untrusted
because nginx passes a client-supplied one through, and TRUSTED_HOSTS lets
Flask reject a forged Host outright.

Flask only autoescapes .html/.htm/.xml/.xhtml/.svg, so every *.html.j2
template interpolated configuration raw. Enabling it changes two lines of
the shipped page, both an apostrophe.

read_catalog degrades an unreadable catalogue to English rather than
serving a 500, and drops non-string entries that would otherwise render as
"42". i18n_sync writes atomically, never overwrites an existing entry,
refuses to touch a catalogue it could not parse, and leaves the file alone
when a run translated nothing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-08-22 00:02:35 +02:00
parent a42930a699
commit 2a35b2910a
46 changed files with 1915 additions and 37 deletions

View File

@@ -1,5 +1,5 @@
<!DOCTYPE html>
<html lang="en">
<html lang="{{ lang }}" dir="{{ lang_dir }}">
<head>
<title>{{platform.titel}}</title>
<meta charset="utf-8" >
@@ -8,8 +8,13 @@
type="image/x-icon"
href="{{ asset_src(platform.favicon) }}"
>
<link rel="canonical" href="{{ url_for('localized_index', lang=lang, _external=True) }}">
{% for code in languages %}
<link rel="alternate" hreflang="{{ code }}" href="{{ url_for('localized_index', lang=code, _external=True) }}">
{% endfor %}
<link rel="alternate" hreflang="x-default" href="{{ url_for('index', _external=True) }}">
<!-- Bootstrap CSS only -->
<link href="{{ url_for('static', filename='vendor/bootstrap/css/bootstrap.min.css') }}" rel="stylesheet">
<link href="{{ url_for('static', filename='vendor/bootstrap/css/bootstrap' ~ ('.rtl' if lang_dir == 'rtl' else '') ~ '.min.css') }}" rel="stylesheet">
<!-- Bootstrap JavaScript Bundle with Popper -->
<script src="{{ url_for('static', filename='vendor/bootstrap/js/bootstrap.bundle.min.js') }}"></script>
<!-- Bootstrap Icons -->
@@ -60,12 +65,13 @@
<p itemprop="name">{{ company.titel }} <br />
{{ company.subtitel }}</p>
<span><i class="fa-solid fa-location-dot"></i> {{ company.address.values() | join(", ") }}</span>
<p><a href="{{company.imprint_url}}" class="iframe-link"><i class="fa-solid fa-scale-balanced"></i> Imprint</a></p>
<p><a href="{{company.imprint_url}}" class="iframe-link"><i class="fa-solid fa-scale-balanced"></i> {{ t('Imprint') }}</a></p>
</div>
</footer>
</div>
<!-- Include modal -->
{% include "moduls/modal.html.j2" %}
<script>window.I18N = {{ ui_strings | tojson }};</script>
{% for name in [
'modal',
'navigation',

View File

@@ -16,14 +16,14 @@
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="dynamicModalLabel"></h5>
<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="{{ t('Close') }}"></button>
</div>
<div class="modal-body">
<!-- Warning box with Markdown -->
{{ alert_box('dynamicModalWarning', 'alert-warning', 'fa-solid fa-triangle-exclamation', 'Warning', 'dynamicModalWarningText') }}
{{ alert_box('dynamicModalWarning', 'alert-warning', 'fa-solid fa-triangle-exclamation', t('Warning'), 'dynamicModalWarningText') }}
<!-- Info box with Markdown -->
{{ alert_box('dynamicModalInfo', 'alert-info', 'fa-solid fa-circle-info', 'Information', 'dynamicModalInfoText') }}
{{ alert_box('dynamicModalInfo', 'alert-info', 'fa-solid fa-circle-info', t('Information'), 'dynamicModalInfoText') }}
<!-- Description text -->
<div id="dynamicDescriptionText" class="mt-2 d-none"></div>
@@ -31,7 +31,7 @@
<!-- Input box for Identifier -->
<div id="dynamicIdentifierBox" class="input-group mt-2 d-none">
<input type="text" id="dynamicModalContent" class="form-control" readonly>
<button class="btn btn-outline-secondary" type="button" id="dynamicCopyButton">Copy</button>
<button class="btn btn-outline-secondary" type="button" id="dynamicCopyButton">{{ t('Copy') }}</button>
</div>
<!-- Link -->
@@ -40,13 +40,13 @@
</div>
<!-- Options -->
{{ list_section('dynamicChildrenSection', 'Options', 'dynamicChildrenList') }}
{{ list_section('dynamicChildrenSection', t('Options'), 'dynamicChildrenList') }}
<!-- Alternatives -->
{{ list_section('dynamicAlternativesSection', 'Alternatives', 'dynamicAlternativesList') }}
{{ list_section('dynamicAlternativesSection', t('Alternatives'), 'dynamicAlternativesList') }}
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-bs-dismiss="modal" onclick="closeAllModals()">Close</button>
<button type="button" class="btn btn-secondary" data-bs-dismiss="modal" onclick="closeAllModals()">{{ t('Close') }}</button>
</div>
</div>
</div>

View File

@@ -98,6 +98,23 @@
</li>
{% endif %}
{% endfor %}
{% if menu_type == "header" %}
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle btn btn-light" id="navbarDropdownLanguage" role="button" data-bs-toggle="dropdown" data-bs-display="dynamic" aria-expanded="false" title="{{ t('Language') }}">
<i class="fa-solid fa-language"></i> {{ languages[lang] }}
</a>
<ul class="dropdown-menu">
{% for code, endonym in languages.items() %}
<li>
<a class="dropdown-item {% if code == lang %}active{% endif %}"
href="{{ url_for('localized_index', lang=code) }}"
hreflang="{{ code }}"
lang="{{ code }}">{{ endonym }}</a>
</li>
{% endfor %}
</ul>
</li>
{% endif %}
</ul>
</div>
</nav>