feat(i18n): add language trainer SEO content and update home page metadata

- Introduced a new section for language trainers in multiple languages (Cebuano, German, English, Spanish, French) to enhance user guidance on beginner courses.
- Updated home page SEO metadata to reflect the addition of language courses, improving search visibility and user engagement.
- Enhanced the NoLoginView component to display the new language trainer information, providing users with clear insights into available resources.

frontend/src/views/home/NoLoginView.vue

@@ -92,6 +92,44 @@
             <PasswordResetDialog ref="passwordResetDialog" />
         </div>
 
+        <section class="seo-content surface-card" aria-label="Sprachtrainer">
+            <h2>{{ $t('home.nologin.languageTrainerSeo.title') }}</h2>
+            <p>
+                {{ $t('home.nologin.languageTrainerSeo.introBefore') }}
+                <strong>{{ $t('home.nologin.languageTrainerSeo.beginnerLabel') }}</strong>
+                {{ $t('home.nologin.languageTrainerSeo.introMiddle') }}
+                <router-link to="/vokabeltrainer">{{ $t('home.nologin.languageTrainerSeo.vocabTrainerLinkText') }}</router-link>:
+                <strong>{{ $t('home.nologin.languageTrainerSeo.bisayaForGerman') }}</strong>
+                {{ $t('home.nologin.languageTrainerSeo.andConnector') }}
+                <strong>{{ $t('home.nologin.languageTrainerSeo.germanForBisaya') }}</strong>.
+                {{ $t('home.nologin.languageTrainerSeo.introAfter') }}
+            </p>
+            <p>
+                <strong>{{ $t('home.nologin.languageTrainerSeo.honestLabel') }}</strong>
+                {{ $t('home.nologin.languageTrainerSeo.honestTextBefore') }}
+                <strong>{{ $t('home.nologin.languageTrainerSeo.rangeLabel') }}</strong>
+                {{ $t('home.nologin.languageTrainerSeo.honestTextMiddle') }}
+                <strong>{{ $t('home.nologin.languageTrainerSeo.belowA2Label') }}</strong>,
+                {{ $t('home.nologin.languageTrainerSeo.honestTextAfter') }}
+            </p>
+
+            <h3>{{ $t('home.nologin.languageTrainerSeo.germanSectionTitle') }}</h3>
+            <p>
+                {{ $t('home.nologin.languageTrainerSeo.germanSectionTextBefore') }}
+                <strong>{{ $t('home.nologin.languageTrainerSeo.germanSectionStrong') }}</strong>
+                {{ $t('home.nologin.languageTrainerSeo.germanSectionTextAfter') }}
+            </p>
+
+            <h3>{{ $t('home.nologin.languageTrainerSeo.bisayaSectionTitle') }}</h3>
+            <p>
+                {{ $t('home.nologin.languageTrainerSeo.bisayaSectionText') }}
+            </p>
+
+            <p>
+                {{ $t('home.nologin.languageTrainerSeo.allCoursesLabel') }}
+                <router-link to="/vokabeltrainer">{{ $t('home.nologin.languageTrainerSeo.vocabTrainerLinkText') }}</router-link>
+            </p>
+        </section>
 
     </div>
 </template>