diff --git a/app/templates/contacts-add.html b/app/templates/contacts-add.html
index 3f04cd9..9fe7eb1 100644
--- a/app/templates/contacts-add.html
+++ b/app/templates/contacts-add.html
@@ -46,17 +46,17 @@
         <!-- URI Paste Tab -->
         <div class="tab-pane fade show active" id="pane-uri" role="tabpanel">
             <div class="mb-3">
-                <label for="uriInput" class="form-label">MeshCore URI:</label>
+                <label for="uriInput" class="form-label">{{ t('contacts.add.uri_label') }}</label>
                 <textarea class="form-control font-monospace" id="uriInput" rows="3"
-                    placeholder="meshcore://contact/add?name=...&public_key=...&type=..."></textarea>
-                <small class="form-text text-muted">Paste a meshcore:// URI from the MeshCore mobile app</small>
+                    placeholder="{{ t('contacts.add.uri_ph') }}"></textarea>
+                <small class="form-text text-muted">{{ t('contacts.add.uri_hint') }}</small>
             </div>
             <!-- URI Preview -->
             <div id="uriPreview" class="alert alert-info d-none mb-3">
-                <strong>Preview:</strong>
-                <div><span class="text-muted">Name:</span> <span id="uriPreviewName"></span></div>
-                <div><span class="text-muted">Key:</span> <span id="uriPreviewKey" class="font-monospace small" style="word-break: break-all;"></span></div>
-                <div><span class="text-muted">Type:</span> <span id="uriPreviewType"></span></div>
+                <strong>{{ t('contacts.add.preview') }}</strong>
+                <div><span class="text-muted">{{ t('contacts.add.name') }}</span> <span id="uriPreviewName"></span></div>
+                <div><span class="text-muted">{{ t('contacts.add.key') }}</span> <span id="uriPreviewKey" class="font-monospace small" style="word-break: break-all;"></span></div>
+                <div><span class="text-muted">{{ t('contacts.add.type_short') }}</span> <span id="uriPreviewType"></span></div>
             </div>
             <button class="btn btn-success" id="addFromUriBtn" disabled>
                 <i class="bi bi-plus-circle"></i> Add Contact
@@ -79,15 +79,15 @@
             </div>
             <!-- File Upload Fallback -->
             <div class="mb-3">
-                <label for="qrFileInput" class="form-label">Or upload a QR code image:</label>
+                <label for="qrFileInput" class="form-label">{{ t('contacts.add.qr_label') }}</label>
                 <input type="file" class="form-control" id="qrFileInput" accept="image/*">
             </div>
             <!-- QR Result -->
             <div id="qrResult" class="alert alert-success d-none mb-3">
-                <strong>Scanned:</strong>
-                <div><span class="text-muted">Name:</span> <span id="qrResultName"></span></div>
-                <div><span class="text-muted">Key:</span> <span id="qrResultKey" class="font-monospace small" style="word-break: break-all;"></span></div>
-                <div><span class="text-muted">Type:</span> <span id="qrResultType"></span></div>
+                <strong>{{ t('contacts.add.scanned') }}</strong>
+                <div><span class="text-muted">{{ t('contacts.add.name') }}</span> <span id="qrResultName"></span></div>
+                <div><span class="text-muted">{{ t('contacts.add.key') }}</span> <span id="qrResultKey" class="font-monospace small" style="word-break: break-all;"></span></div>
+                <div><span class="text-muted">{{ t('contacts.add.type_short') }}</span> <span id="qrResultType"></span></div>
             </div>
             <div id="qrError" class="alert alert-danger d-none mb-3"></div>
             <button class="btn btn-success d-none" id="addFromQrBtn">
@@ -98,17 +98,17 @@
         <!-- Manual Entry Tab -->
         <div class="tab-pane fade" id="pane-manual" role="tabpanel">
             <div class="mb-3">
-                <label for="manualName" class="form-label">Name:</label>
-                <input type="text" class="form-control" id="manualName" placeholder="Contact name" maxlength="32">
+                <label for="manualName" class="form-label">{{ t('contacts.add.name') }}</label>
+                <input type="text" class="form-control" id="manualName" placeholder="{{ t('contacts.add.name_ph') }}" maxlength="32">
             </div>
             <div class="mb-3">
-                <label for="manualKey" class="form-label">Public Key (64 hex chars):</label>
+                <label for="manualKey" class="form-label">{{ t('contacts.add.pubkey') }}</label>
                 <input type="text" class="form-control font-monospace" id="manualKey"
-                    placeholder="e.g. a1b2c3d4..." maxlength="64" pattern="[0-9a-fA-F]{64}">
+                    placeholder="{{ t('contacts.add.pubkey_ph') }}" maxlength="64" pattern="[0-9a-fA-F]{64}">
                 <small class="form-text text-muted" id="manualKeyCount">0 / 64 characters</small>
             </div>
             <div class="mb-3">
-                <label for="manualType" class="form-label">Contact Type:</label>
+                <label for="manualType" class="form-label">{{ t('contacts.add.type') }}</label>
                 <select class="form-select" id="manualType">
                     <option value="1" selected>COM (Companion)</option>
                     <option value="2">REP (Repeater)</option>
diff --git a/app/templates/contacts-existing.html b/app/templates/contacts-existing.html
index 0295ccb..b78f234 100644
--- a/app/templates/contacts-existing.html
+++ b/app/templates/contacts-existing.html
@@ -24,23 +24,23 @@
 
     <!-- Search Toolbar -->
     <div class="search-toolbar">
-        <input type="text" class="form-control" id="searchInput" placeholder="Search by name or public key...">
+        <input type="text" class="form-control" id="searchInput" placeholder="{{ t('contacts.existing.search_ph') }}">
     </div>
 
     <!-- Filter and Sort Toolbar -->
     <div class="filter-sort-toolbar">
         <!-- Source Filter -->
         <select class="form-select" id="sourceFilter">
-            <option value="ALL">All sources</option>
-            <option value="DEVICE">On device</option>
-            <option value="CACHE">Cache only</option>
-            <option value="IGNORED">Ignored</option>
-            <option value="BLOCKED">Blocked</option>
+            <option value="ALL">{{ t('contacts.filter.all_sources') }}</option>
+            <option value="DEVICE">{{ t('contacts.filter.on_device') }}</option>
+            <option value="CACHE">{{ t('contacts.filter.cache_only') }}</option>
+            <option value="IGNORED">{{ t('contacts.filter.ignored') }}</option>
+            <option value="BLOCKED">{{ t('contacts.filter.blocked') }}</option>
         </select>
 
         <!-- Type Filter -->
         <select class="form-select" id="typeFilter">
-            <option value="ALL">All Types</option>
+            <option value="ALL">{{ t('contacts.filter.all_types') }}</option>
             <option value="COM">COM</option>
             <option value="REP">REP</option>
             <option value="ROOM">ROOM</option>
@@ -61,14 +61,14 @@
         <div class="spinner-border text-primary" role="status">
             <span class="visually-hidden">Loading...</span>
         </div>
-        <p class="mt-3 text-muted">Loading contacts...</p>
+        <p class="mt-3 text-muted">{{ t('contacts.existing.loading') }}</p>
     </div>
 
     <!-- Empty State -->
     <div id="existingEmpty" class="empty-state" style="display: none;">
         <i class="bi bi-inbox"></i>
-        <p class="mb-0">No contacts found</p>
-        <small class="text-muted">Contacts will appear here once added</small>
+        <p class="mb-0">{{ t('contacts.existing.none') }}</p>
+        <small class="text-muted">{{ t('contacts.existing.none_hint') }}</small>
     </div>
 
     <!-- Existing Contacts List (Full-screen) -->
@@ -79,7 +79,7 @@
     <!-- Error State -->
     <div id="existingError" class="alert alert-danger" style="display: none;" role="alert">
         <i class="bi bi-exclamation-triangle"></i>
-        <span id="existingErrorMessage">Failed to load contacts</span>
+        <span id="existingErrorMessage">{{ t('contacts.existing.load_failed') }}</span>
     </div>
 </div>
 {% endblock %}
diff --git a/app/templates/contacts-manage.html b/app/templates/contacts-manage.html
index 0ca5511..fffa362 100644
--- a/app/templates/contacts-manage.html
+++ b/app/templates/contacts-manage.html
@@ -10,7 +10,7 @@
         <div class="nav-card" onclick="navigateTo('/contacts/add');" style="border-left: 4px solid #198754;">
             <div>
                 <h6><i class="bi bi-person-plus"></i> Add Contact</h6>
-                <small class="text-muted">Add from URI, QR code, or manual entry</small>
+                <small class="text-muted">{{ t('contacts.card.add_desc') }}</small>
             </div>
             <i class="bi bi-chevron-right text-muted"></i>
         </div>
@@ -19,7 +19,7 @@
         <div class="nav-card" onclick="navigateTo('/contacts/pending');">
             <div>
                 <h6><i class="bi bi-hourglass-split"></i> Pending Contacts</h6>
-                <small class="text-muted">Contacts awaiting manual approval</small>
+                <small class="text-muted">{{ t('contacts.card.pending_desc') }}</small>
             </div>
             <span class="badge bg-primary rounded-pill" id="pendingBadge" style="font-size: 1.1rem;">
                 <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
@@ -30,7 +30,7 @@
         <div class="nav-card" onclick="navigateTo('/contacts/existing');">
             <div>
                 <h6><i class="bi bi-person-lines-fill"></i> Existing Contacts</h6>
-                <small class="text-muted">Manage all stored contacts</small>
+                <small class="text-muted">{{ t('contacts.card.existing_desc') }}</small>
             </div>
             <span class="badge counter-badge counter-ok rounded-pill" id="existingBadge" style="font-size: 1.1rem;">
                 <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
@@ -42,17 +42,17 @@
     <div class="cleanup-section">
         <h6>
             <i class="bi bi-trash"></i>
-            <span>Cleanup Contacts</span>
+            <span>{{ t('contacts.cleanup.title') }}</span>
             <i class="bi bi-info-circle info-icon"
                data-bs-toggle="tooltip"
                data-bs-placement="top"
-               title="Remove contacts based on various filter criteria"></i>
+               title="{{ t('contacts.cleanup.title_hint') }}"></i>
         </h6>
 
         <!-- Basic Filters (Always visible) -->
         <div class="mb-3">
-            <label for="cleanupNameFilter" class="form-label">Name Filter (optional):</label>
-            <input type="text" class="form-control" id="cleanupNameFilter" placeholder="Enter partial name to search...">
+            <label for="cleanupNameFilter" class="form-label">{{ t('contacts.cleanup.name_filter') }}</label>
+            <input type="text" class="form-control" id="cleanupNameFilter" placeholder="{{ t('contacts.cleanup.name_filter_ph') }}">
         </div>
 
         <!-- Advanced Filters (Collapsible) -->
@@ -65,7 +65,7 @@
         <div class="collapse" id="advancedFilters">
             <!-- Contact Types -->
             <div class="mb-3">
-                <label class="form-label">Contact Types:</label>
+                <label class="form-label">{{ t('contacts.cleanup.types') }}</label>
                 <div class="d-flex flex-wrap gap-2">
                     <div class="form-check">
                         <input class="form-check-input cleanup-type-filter" type="checkbox" value="1" id="cleanupTypeCOM" checked>
@@ -88,15 +88,15 @@
 
             <!-- Date Field -->
             <div class="mb-3">
-                <label class="form-label">Date Field:</label>
+                <label class="form-label">{{ t('contacts.cleanup.date_field') }}</label>
                 <div class="d-flex gap-3">
                     <div class="form-check">
                         <input class="form-check-input" type="radio" name="cleanupDateField" id="cleanupDateLastAdvert" value="last_advert" checked>
-                        <label class="form-check-label" for="cleanupDateLastAdvert">Last Advert</label>
+                        <label class="form-check-label" for="cleanupDateLastAdvert">{{ t('contacts.cleanup.last_advert') }}</label>
                     </div>
                     <div class="form-check">
                         <input class="form-check-input" type="radio" name="cleanupDateField" id="cleanupDateLastMod" value="lastmod">
-                        <label class="form-check-label" for="cleanupDateLastMod">Last Modified</label>
+                        <label class="form-check-label" for="cleanupDateLastMod">{{ t('contacts.cleanup.last_modified') }}</label>
                     </div>
                 </div>
             </div>
@@ -105,7 +105,7 @@
             <div class="mb-3">
                 <label for="cleanupDays" class="form-label">Days of Inactivity (0 = ignore):</label>
                 <input type="number" class="form-control" id="cleanupDays" value="0" min="0">
-                <small class="form-text text-muted">Contacts inactive for more than this many days will be selected</small>
+                <small class="form-text text-muted">{{ t('contacts.cleanup.days_hint') }}</small>
             </div>
 
             <!-- Auto-Cleanup Toggle -->
@@ -113,18 +113,18 @@
                 <div class="form-check form-switch d-flex align-items-center gap-2">
                     <input class="form-check-input" type="checkbox" role="switch" id="autoCleanupSwitch" style="cursor: pointer; min-width: 3rem; min-height: 1.5rem;">
                     <label class="form-check-label" for="autoCleanupSwitch" style="cursor: pointer; font-weight: 500;">
-                        <span id="autoCleanupLabel">Enable Auto-Cleanup</span>
+                        <span id="autoCleanupLabel">{{ t('contacts.cleanup.enable') }}</span>
                     </label>
                     <i class="bi bi-info-circle info-icon"
                        data-bs-toggle="tooltip"
                        data-bs-placement="top"
-                       title="When enabled, contacts matching the above criteria will be automatically deleted daily at the specified hour"></i>
+                       title="{{ t('contacts.cleanup.enable_hint') }}"></i>
                 </div>
                 <small class="text-muted">Status: <span id="autoCleanupStatusText">Loading...</span></small>
 
                 <!-- Cleanup Hour Selector -->
                 <div class="mt-2 d-flex align-items-center gap-2">
-                    <label for="cleanupHour" class="form-label mb-0 small">Run at:</label>
+                    <label for="cleanupHour" class="form-label mb-0 small">{{ t('contacts.cleanup.run_at') }}</label>
                     <select class="form-select form-select-sm" id="cleanupHour" style="width: auto;" disabled>
                         <option value="0">00:00</option>
                         <option value="1" selected>01:00</option>
@@ -170,7 +170,7 @@
                 <h5 class="modal-title" id="cleanupConfirmModalLabel">
                     <i class="bi bi-exclamation-triangle"></i> Confirm Contact Cleanup
                 </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('common.close') }}"></button>
             </div>
             <div class="modal-body">
                 <p class="fw-bold">The following <span id="cleanupContactCount">0</span> contact(s) will be permanently deleted:</p>
@@ -179,11 +179,11 @@
                 </div>
                 <div class="alert alert-warning mb-0">
                     <i class="bi bi-exclamation-circle"></i>
-                    <strong>Warning:</strong> This action cannot be undone!
+                    <strong>{{ t('common.warning') }}</strong> This action cannot be undone!
                 </div>
             </div>
             <div class="modal-footer">
-                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
+                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{{ t('common.cancel') }}</button>
                 <button type="button" class="btn btn-danger" id="confirmCleanupBtn">
                     <i class="bi bi-trash"></i> Delete Contacts
                 </button>
diff --git a/app/templates/contacts-pending.html b/app/templates/contacts-pending.html
index f50ac31..9786f4e 100644
--- a/app/templates/contacts-pending.html
+++ b/app/templates/contacts-pending.html
@@ -30,7 +30,7 @@
                     <i class="bi bi-funnel"></i> Filters
                     <i class="bi bi-info-circle text-muted ms-1" role="button" tabindex="0"
                        data-bs-toggle="tooltip" data-bs-placement="right"
-                       title="Filter contacts by type or name, then approve or ignore them in bulk."></i>
+                       title="{{ t('contacts.pending.filter_hint') }}"></i>
                 </h6>
 
                 <!-- Type Filter Badges -->
@@ -44,7 +44,7 @@
                 <!-- Search + Batch Action Buttons -->
                 <div class="d-flex gap-2">
                     <input type="text" class="form-control form-control-sm" id="pendingSearchInput"
-                           placeholder="Search..." style="min-width: 0;">
+                           placeholder="{{ t('logs.filter.search_ph') }}" style="min-width: 0;">
                     <button class="btn btn-success btn-sm flex-shrink-0" id="addFilteredBtn">
                         <i class="bi bi-check-circle-fill"></i> Approve
                     </button>
@@ -61,14 +61,14 @@
         <div class="spinner-border text-primary" role="status">
             <span class="visually-hidden">Loading...</span>
         </div>
-        <p class="mt-3 text-muted">Loading pending contacts...</p>
+        <p class="mt-3 text-muted">{{ t('contacts.pending.loading') }}</p>
     </div>
 
     <!-- Empty State -->
     <div id="pendingEmpty" class="empty-state" style="display: none;">
         <i class="bi bi-check-circle"></i>
-        <p class="mb-0">No pending requests</p>
-        <small class="text-muted">New contact requests will appear here when manual approval is enabled</small>
+        <p class="mb-0">{{ t('contacts.pending.none') }}</p>
+        <small class="text-muted">{{ t('contacts.pending.none_hint') }}</small>
     </div>
 
     <!-- Pending Contacts List (Full-screen) -->
@@ -79,7 +79,7 @@
     <!-- Error State -->
     <div id="pendingError" class="alert alert-danger" style="display: none;" role="alert">
         <i class="bi bi-exclamation-triangle"></i>
-        <span id="pendingErrorMessage">Failed to load pending contacts</span>
+        <span id="pendingErrorMessage">{{ t('contacts.pending.load_failed') }}</span>
     </div>
 </div>
 
@@ -91,7 +91,7 @@
                 <h5 class="modal-title" id="batchApprovalModalLabel">
                     <i class="bi bi-check-circle"></i> Confirm Batch Approval
                 </h5>
-                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
+                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="{{ t('common.close') }}"></button>
             </div>
             <div class="modal-body">
                 <p class="mb-2">You are about to approve <strong id="batchApprovalCount">0</strong> contacts:</p>
@@ -106,7 +106,7 @@
                 </div>
             </div>
             <div class="modal-footer">
-                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
+                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{{ t('common.cancel') }}</button>
                 <button type="button" class="btn btn-success" id="confirmBatchApprovalBtn">
                     <i class="bi bi-check-circle-fill"></i> Approve All
                 </button>
@@ -123,7 +123,7 @@
                 <h5 class="modal-title" id="batchIgnoreModalLabel">
                     <i class="bi bi-eye-slash"></i> Confirm Batch Ignore
                 </h5>
-                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
+                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="{{ t('common.close') }}"></button>
             </div>
             <div class="modal-body">
                 <p class="mb-2">You are about to ignore <strong id="batchIgnoreCount">0</strong> contacts:</p>
@@ -136,7 +136,7 @@
                 </div>
             </div>
             <div class="modal-footer">
-                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
+                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{{ t('common.cancel') }}</button>
                 <button type="button" class="btn btn-outline-secondary" id="confirmBatchIgnoreBtn">
                     <i class="bi bi-eye-slash"></i> Ignore All
                 </button>
diff --git a/app/templates/contacts_base.html b/app/templates/contacts_base.html
index 4bff5b8..5d21c8f 100644
--- a/app/templates/contacts_base.html
+++ b/app/templates/contacts_base.html
@@ -3,7 +3,7 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover">
-    <title>{% block title %}Contact Management - mc-webui{% endblock %}</title>
+    <title>{% block title %}{{ t('contacts.title') }} - mc-webui{% endblock %}</title>
 
     <!-- Theme: apply saved preference before CSS loads to prevent flash -->
     <script>
@@ -257,22 +257,22 @@
             <div class="modal-content">
                 <div class="modal-header bg-danger text-white">
                     <h5 class="modal-title" id="deleteContactModalLabel">
-                        <i class="bi bi-exclamation-triangle"></i> Confirm Delete
+                        <i class="bi bi-exclamation-triangle"></i> {{ t('contacts.delete.title') }}
                     </h5>
-                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
+                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="{{ t('common.close') }}"></button>
                 </div>
                 <div class="modal-body">
-                    <p class="mb-2">Are you sure you want to delete this contact?</p>
+                    <p class="mb-2">{{ t('contacts.delete.question') }}</p>
                     <div class="alert alert-warning mb-0">
                         <strong id="deleteContactName"></strong><br>
                         <small class="font-monospace" id="deleteContactKey"></small>
                     </div>
-                    <p class="text-muted small mt-2 mb-0">This action cannot be undone.</p>
+                    <p class="text-muted small mt-2 mb-0">{{ t('common.cannot_undo') }}</p>
                 </div>
                 <div class="modal-footer">
-                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
+                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{{ t('common.cancel') }}</button>
                     <button type="button" class="btn btn-danger" id="confirmDeleteBtn">
-                        <i class="bi bi-trash"></i> Delete Contact
+                        <i class="bi bi-trash"></i> {{ t('contacts.delete.confirm') }}
                     </button>
                 </div>
             </div>
@@ -283,7 +283,7 @@
     <div class="toast-container position-fixed top-0 start-0 p-3" data-toast-container>
         <div id="contactToast" class="toast" role="alert">
             <div class="toast-header">
-                <strong class="me-auto">Contact Management</strong>
+                <strong class="me-auto">{{ t('contacts.title') }}</strong>
                 <button type="button" class="btn-close" data-bs-dismiss="toast"></button>
             </div>
             <div class="toast-body"></div>
@@ -295,14 +295,14 @@
         <div class="modal-dialog modal-lg modal-dialog-centered">
             <div class="modal-content">
                 <div class="modal-header">
-                    <h5 class="modal-title"><i class="bi bi-geo-alt"></i> <span id="mapModalTitle">Map</span></h5>
+                    <h5 class="modal-title"><i class="bi bi-geo-alt"></i> <span id="mapModalTitle">{{ t('contacts.map.title') }}</span></h5>
                     <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                 </div>
                 <div class="modal-body p-0">
                     <!-- Type filter (hidden for single contact view) -->
                     <div id="mapTypeFilter" class="d-none px-3 py-2 border-bottom bg-light">
                         <div class="d-flex flex-wrap gap-2 align-items-center">
-                            <span class="small text-muted me-1">Show:</span>
+                            <span class="small text-muted me-1">{{ t('contacts.map.show') }}</span>
                             <span class="map-filter-badge active" data-type="1" id="mapFilterCOM">COM</span>
                             <span class="map-filter-badge active" data-type="2" id="mapFilterREP">REP</span>
                             <span class="map-filter-badge active" data-type="3" id="mapFilterROOM">ROOM</span>
diff --git a/app/translations/en.json b/app/translations/en.json
index 25b2a53..b815669 100644
--- a/app/translations/en.json
+++ b/app/translations/en.json
@@ -1,6 +1,7 @@
 {
   "common.add": "Add",
   "common.cancel": "Cancel",
+  "common.cannot_undo": "This action cannot be undone.",
   "common.close": "Close",
   "common.days_ago": {
     "one": "{count}d ago",
@@ -16,6 +17,7 @@
   "common.remove": "Remove",
   "common.save": "Save",
   "common.try_again": "Try again",
+  "common.warning": "Warning:",
   "common.yesterday": "Yesterday",
   "console.clear_title": "Clear output history",
   "console.connect_failed": "Failed to connect: {error}",
@@ -31,6 +33,56 @@
   "console.status.connecting": "Connecting...",
   "console.status.disconnected": "Disconnected",
   "console.title": "Console",
+  "contacts.add.key": "Key:",
+  "contacts.add.name": "Name:",
+  "contacts.add.name_ph": "Contact name",
+  "contacts.add.preview": "Preview:",
+  "contacts.add.pubkey": "Public Key (64 hex chars):",
+  "contacts.add.pubkey_ph": "e.g. a1b2c3d4...",
+  "contacts.add.qr_label": "Or upload a QR code image:",
+  "contacts.add.scanned": "Scanned:",
+  "contacts.add.type": "Contact Type:",
+  "contacts.add.type_short": "Type:",
+  "contacts.add.uri_hint": "Paste a meshcore:// URI from the MeshCore mobile app",
+  "contacts.add.uri_label": "MeshCore URI:",
+  "contacts.add.uri_ph": "meshcore://contact/add?name=...&public_key=...&type=...",
+  "contacts.card.add_desc": "Add from URI, QR code, or manual entry",
+  "contacts.card.existing_desc": "Manage all stored contacts",
+  "contacts.card.pending_desc": "Contacts awaiting manual approval",
+  "contacts.cleanup.date_field": "Date Field:",
+  "contacts.cleanup.days_hint": "Contacts inactive for more than this many days will be selected",
+  "contacts.cleanup.enable": "Enable Auto-Cleanup",
+  "contacts.cleanup.enable_hint": "When enabled, contacts matching the above criteria will be automatically deleted daily at the specified hour",
+  "contacts.cleanup.last_advert": "Last Advert",
+  "contacts.cleanup.last_modified": "Last Modified",
+  "contacts.cleanup.name_filter": "Name Filter (optional):",
+  "contacts.cleanup.name_filter_ph": "Enter partial name to search...",
+  "contacts.cleanup.run_at": "Run at:",
+  "contacts.cleanup.title": "Cleanup Contacts",
+  "contacts.cleanup.title_hint": "Remove contacts based on various filter criteria",
+  "contacts.cleanup.types": "Contact Types:",
+  "contacts.delete.confirm": "Delete Contact",
+  "contacts.delete.question": "Are you sure you want to delete this contact?",
+  "contacts.delete.title": "Confirm Delete",
+  "contacts.existing.load_failed": "Failed to load contacts",
+  "contacts.existing.loading": "Loading contacts...",
+  "contacts.existing.none": "No contacts found",
+  "contacts.existing.none_hint": "Contacts will appear here once added",
+  "contacts.existing.search_ph": "Search by name or public key...",
+  "contacts.filter.all_sources": "All sources",
+  "contacts.filter.all_types": "All Types",
+  "contacts.filter.blocked": "Blocked",
+  "contacts.filter.cache_only": "Cache only",
+  "contacts.filter.ignored": "Ignored",
+  "contacts.filter.on_device": "On device",
+  "contacts.map.show": "Show:",
+  "contacts.map.title": "Map",
+  "contacts.pending.filter_hint": "Filter contacts by type or name, then approve or ignore them in bulk.",
+  "contacts.pending.load_failed": "Failed to load pending contacts",
+  "contacts.pending.loading": "Loading pending contacts...",
+  "contacts.pending.none": "No pending requests",
+  "contacts.pending.none_hint": "New contact requests will appear here when manual approval is enabled",
+  "contacts.title": "Contact Management",
   "logs.clear_title": "Clear display",
   "logs.entries": {
     "one": "{count} entry",
diff --git a/app/translations/pl.json b/app/translations/pl.json
index fef72c5..7249a69 100644
--- a/app/translations/pl.json
+++ b/app/translations/pl.json
@@ -1,6 +1,7 @@
 {
   "common.add": "Dodaj",
   "common.cancel": "Anuluj",
+  "common.cannot_undo": "Tej operacji nie można cofnąć.",
   "common.close": "Zamknij",
   "common.days_ago": {
     "one": "{count} dzień temu",
@@ -18,6 +19,7 @@
   "common.remove": "Usuń",
   "common.save": "Zapisz",
   "common.try_again": "Spróbuj ponownie",
+  "common.warning": "Uwaga:",
   "common.yesterday": "Wczoraj",
   "console.clear_title": "Wyczyść zapis konsoli",
   "console.connect_failed": "Nie udało się połączyć: {error}",
@@ -33,6 +35,56 @@
   "console.status.connecting": "Łączenie...",
   "console.status.disconnected": "Rozłączono",
   "console.title": "Konsola",
+  "contacts.add.key": "Klucz:",
+  "contacts.add.name": "Nazwa:",
+  "contacts.add.name_ph": "Nazwa kontaktu",
+  "contacts.add.preview": "Podgląd:",
+  "contacts.add.pubkey": "Klucz publiczny (64 znaki hex):",
+  "contacts.add.pubkey_ph": "np. a1b2c3d4...",
+  "contacts.add.qr_label": "Albo wgraj obraz z kodem QR:",
+  "contacts.add.scanned": "Zeskanowano:",
+  "contacts.add.type": "Typ kontaktu:",
+  "contacts.add.type_short": "Typ:",
+  "contacts.add.uri_hint": "Wklej URI meshcore:// z aplikacji mobilnej MeshCore",
+  "contacts.add.uri_label": "MeshCore URI:",
+  "contacts.add.uri_ph": "meshcore://contact/add?name=...&public_key=...&type=...",
+  "contacts.card.add_desc": "Dodaj z URI, kodu QR lub ręcznie",
+  "contacts.card.existing_desc": "Zarządzaj wszystkimi zapisanymi kontaktami",
+  "contacts.card.pending_desc": "Kontakty oczekujące na ręczne zatwierdzenie",
+  "contacts.cleanup.date_field": "Pole daty:",
+  "contacts.cleanup.days_hint": "Zaznaczone zostaną kontakty nieaktywne dłużej niż tyle dni",
+  "contacts.cleanup.enable": "Włącz automatyczne czyszczenie",
+  "contacts.cleanup.enable_hint": "Gdy włączone, kontakty spełniające powyższe kryteria będą usuwane codziennie o wskazanej godzinie",
+  "contacts.cleanup.last_advert": "Ostatni advert",
+  "contacts.cleanup.last_modified": "Ostatnia zmiana",
+  "contacts.cleanup.name_filter": "Filtr nazwy (opcjonalnie):",
+  "contacts.cleanup.name_filter_ph": "Wpisz fragment nazwy do wyszukania...",
+  "contacts.cleanup.run_at": "Uruchom o:",
+  "contacts.cleanup.title": "Czyszczenie kontaktów",
+  "contacts.cleanup.title_hint": "Usuń kontakty według różnych kryteriów",
+  "contacts.cleanup.types": "Typy kontaktów:",
+  "contacts.delete.confirm": "Usuń kontakt",
+  "contacts.delete.question": "Czy na pewno chcesz usunąć ten kontakt?",
+  "contacts.delete.title": "Potwierdź usunięcie",
+  "contacts.existing.load_failed": "Nie udało się wczytać kontaktów",
+  "contacts.existing.loading": "Wczytywanie kontaktów...",
+  "contacts.existing.none": "Nie znaleziono kontaktów",
+  "contacts.existing.none_hint": "Kontakty pojawią się tutaj po dodaniu",
+  "contacts.existing.search_ph": "Szukaj po nazwie lub kluczu publicznym...",
+  "contacts.filter.all_sources": "Wszystkie źródła",
+  "contacts.filter.all_types": "Wszystkie typy",
+  "contacts.filter.blocked": "Zablokowane",
+  "contacts.filter.cache_only": "Tylko w pamięci",
+  "contacts.filter.ignored": "Ignorowane",
+  "contacts.filter.on_device": "Na urządzeniu",
+  "contacts.map.show": "Pokaż:",
+  "contacts.map.title": "Mapa",
+  "contacts.pending.filter_hint": "Filtruj kontakty po typie lub nazwie, a następnie zatwierdź lub zignoruj je zbiorczo.",
+  "contacts.pending.load_failed": "Nie udało się wczytać oczekujących kontaktów",
+  "contacts.pending.loading": "Wczytywanie oczekujących kontaktów...",
+  "contacts.pending.none": "Brak oczekujących zgłoszeń",
+  "contacts.pending.none_hint": "Nowe zgłoszenia kontaktów pojawią się tutaj, gdy włączone jest ręczne zatwierdzanie",
+  "contacts.title": "Zarządzanie kontaktami",
   "logs.clear_title": "Wyczyść widok",
   "logs.entries": {
     "one": "{count} wpis",