diff --git a/frontend/src/components/C2CallbackPicker.tsx b/frontend/src/components/C2CallbackPicker.tsx
index 7c760c0..ac4f683 100644
--- a/frontend/src/components/C2CallbackPicker.tsx
+++ b/frontend/src/components/C2CallbackPicker.tsx
@@ -1,3 +1,4 @@
+import { useTranslation } from 'react-i18next';
 import { extractApiError } from '@/api/client';
 import type { C2Callback } from '@/api/types';
 
@@ -20,20 +21,22 @@ export function C2CallbackPicker({
   onSelect,
   rowTestId = 'c2-callback-row',
 }: C2CallbackPickerProps): JSX.Element {
+  const { t } = useTranslation();
+
   if (isLoading) {
-    return <p className="text-[14px] text-graphite">Loading callbacks…</p>;
+    return <p className="text-[14px] text-graphite">{t('state.loading')}</p>;
   }
 
   if (isError) {
     return (
       <p className="text-[14px] text-bloom-deep">
-        Could not load callbacks: {extractApiError(error, 'Unknown error')}
+        {extractApiError(error, t('state.error.desc'))}
       </p>
     );
   }
 
   if (callbacks.length === 0) {
-    return <p className="text-[14px] text-graphite">No callbacks available.</p>;
+    return <p className="text-[14px] text-graphite">{t('c2.modal.picker.empty')}</p>;
   }
 
   return (
@@ -41,12 +44,12 @@ export function C2CallbackPicker({
       <table className="w-full text-[14px]">
         <thead>
           <tr className="bg-cloud border-b border-hairline">
-            <th className="px-md py-sm text-left font-medium text-ink">Display ID</th>
-            <th className="px-md py-sm text-left font-medium text-ink">Active</th>
-            <th className="px-md py-sm text-left font-medium text-ink">Host</th>
-            <th className="px-md py-sm text-left font-medium text-ink">User</th>
-            <th className="px-md py-sm text-left font-medium text-ink">Domain</th>
-            <th className="px-md py-sm text-left font-medium text-ink">Last check-in</th>
+            <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.picker.col.displayId')}</th>
+            <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.picker.col.active')}</th>
+            <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.picker.col.host')}</th>
+            <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.picker.col.user')}</th>
+            <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.picker.col.domain')}</th>
+            <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.picker.col.lastCheckin')}</th>
           </tr>
         </thead>
         <tbody>
@@ -78,7 +81,7 @@ export function C2CallbackPicker({
                         : 'bg-cloud text-graphite border border-hairline'
                     }`}
                   >
-                    {cb.active ? 'Active' : 'Inactive'}
+                    {cb.active ? t('c2.modal.picker.status.active') : t('c2.modal.picker.status.inactive')}
                   </span>
                 </td>
                 <td className="px-md py-sm font-mono">{cb.host}</td>
diff --git a/frontend/src/components/C2ConfigCard.tsx b/frontend/src/components/C2ConfigCard.tsx
index 7dc2955..5e0cf1f 100644
--- a/frontend/src/components/C2ConfigCard.tsx
+++ b/frontend/src/components/C2ConfigCard.tsx
@@ -1,4 +1,5 @@
 import { useEffect, useState, type FormEvent } from 'react';
+import { useTranslation } from 'react-i18next';
 import { extractApiError } from '@/api/client';
 import { useC2Config, useDeleteC2Config, useTestC2Config, useUpdateC2Config } from '@/hooks/useC2';
 import { ConfirmDialog } from './ConfirmDialog';
@@ -10,6 +11,7 @@ interface C2ConfigCardProps {
 }
 
 export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
+  const { t } = useTranslation();
   const { push } = useToast();
 
   const configQuery = useC2Config(engagementId);
@@ -55,11 +57,11 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
 
     try {
       await updateMutation.mutateAsync(input);
-      push('C2 configuration saved', 'success');
+      push(t('c2.config.toast.saved'), 'success');
       setToken('');
       setReplaceToken(false);
     } catch (err) {
-      push(extractApiError(err, 'Could not save C2 configuration'), 'error');
+      push(extractApiError(err, t('c2.config.error.save')), 'error');
     }
   };
 
@@ -68,13 +70,13 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
     setTestResult(null);
     try {
       await deleteMutation.mutateAsync();
-      push('C2 configuration removed', 'success');
+      push(t('c2.config.toast.deleted'), 'success');
       setUrl('');
       setToken('');
       setVerifyTls(false);
       setReplaceToken(false);
     } catch (err) {
-      push(extractApiError(err, 'Could not remove C2 configuration'), 'error');
+      push(extractApiError(err, t('c2.config.error.delete')), 'error');
     }
   };
 
@@ -84,10 +86,10 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
       const result = await testMutation.mutateAsync();
       setTestResult({
         ok: result.ok,
-        message: result.ok ? 'Connected' : (result.error ?? 'Connection failed'),
+        message: result.ok ? t('c2.config.connected') : (result.error ?? t('c2.config.connectionFailed')),
       });
     } catch (err) {
-      setTestResult({ ok: false, message: extractApiError(err, 'Test failed') });
+      setTestResult({ ok: false, message: extractApiError(err, t('c2.config.connectionFailed')) });
     }
   };
 
@@ -98,25 +100,25 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
       data-testid="c2-config-card"
       className="card-product flex flex-col gap-md"
     >
-      <h2 className="text-[20px] font-medium text-ink">C2 configuration</h2>
+      <h2 className="text-[20px] font-medium text-ink">{t('c2.config.title')}</h2>
 
       {is503 && (
         <div
           role="alert"
           className="rounded-none px-xl py-md bg-fog border border-hairline text-[14px] text-charcoal"
         >
-          C2 features are disabled (server has no encryption key configured).
+          {t('c2.config.disabled')}
         </div>
       )}
 
       {configQuery.isLoading ? (
-        <p className="text-[14px] text-graphite">Loading…</p>
+        <p className="text-[14px] text-graphite">{t('c2.config.loading')}</p>
       ) : (
         <form onSubmit={onSave} noValidate className="flex flex-col gap-md">
           <FormField
-            label="URL"
+            label={t('c2.config.field.url')}
             htmlFor="c2-url"
-            hint="HTTPS required (e.g. https://mythic.lab:7443)"
+            hint={t('c2.config.field.urlHint')}
           >
             <TextInput
               id="c2-url"
@@ -130,7 +132,7 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
             />
           </FormField>
 
-          <FormField label="API token" htmlFor="c2-token">
+          <FormField label={t('c2.config.field.token')} htmlFor="c2-token">
             {config?.has_token && !replaceToken ? (
               <div className="flex items-center gap-md">
                 <TextInput
@@ -149,7 +151,7 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
                   onClick={() => setReplaceToken(true)}
                   disabled={disabled}
                 >
-                  Replace token
+                  {t('c2.config.btn.replaceToken')}
                 </button>
               </div>
             ) : (
@@ -158,7 +160,7 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
                 data-testid="c2-token-input"
                 type="password"
                 name="api_token"
-                placeholder={config?.has_token ? 'Enter new token' : 'API token'}
+                placeholder={config?.has_token ? t('c2.config.field.tokenHint') : t('c2.config.field.token')}
                 value={token}
                 onChange={(e) => setToken(e.target.value)}
                 disabled={disabled}
@@ -178,12 +180,11 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
                 className="h-4 w-4 accent-primary"
               />
               <label htmlFor="c2-verify-tls" className="text-[14px] text-ink">
-                Verify TLS certificate
+                {t('c2.config.field.verifyTls')}
               </label>
             </div>
             <p className="text-[12px] text-graphite">
-              Uncheck only for lab Mythic with self-signed certificates. Disabling
-              verification exposes the API token to MITM.
+              {t('c2.config.field.verifyTlsHint')}
             </p>
           </div>
 
@@ -194,7 +195,7 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
               className="btn-primary"
               disabled={disabled || submitting}
             >
-              {updateMutation.isPending ? 'Saving…' : 'Save'}
+              {updateMutation.isPending ? t('c2.config.btn.saving') : t('c2.config.btn.save')}
             </button>
 
             <button
@@ -204,7 +205,7 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
               onClick={onTest}
               disabled={disabled || testMutation.isPending || !config}
             >
-              {testMutation.isPending ? 'Testing…' : 'Test connection'}
+              {testMutation.isPending ? t('c2.config.btn.testing') : t('c2.config.btn.test')}
             </button>
 
             {testResult !== null && (
@@ -223,7 +224,7 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
                 onClick={() => setShowDeleteConfirm(true)}
                 disabled={disabled || submitting}
               >
-                Delete configuration
+                {t('c2.config.btn.delete')}
               </button>
             )}
           </div>
@@ -232,10 +233,10 @@ export function C2ConfigCard({ engagementId }: C2ConfigCardProps): JSX.Element {
 
       {showDeleteConfirm && (
         <ConfirmDialog
-          title="Delete C2 configuration"
-          description="This will remove the C2 configuration for this engagement. The API token will be permanently deleted."
-          confirmLabel="Delete"
-          cancelLabel="Cancel"
+          title={t('c2.config.deleteConfirm.title')}
+          description={t('c2.config.deleteConfirm.desc')}
+          confirmLabel={t('c2.config.deleteConfirm.confirm')}
+          cancelLabel={t('c2.config.deleteConfirm.cancel')}
           destructive
           onConfirm={onDelete}
           onCancel={() => setShowDeleteConfirm(false)}
diff --git a/frontend/src/components/C2TasksPanel.tsx b/frontend/src/components/C2TasksPanel.tsx
index 138729a..0a9e8f8 100644
--- a/frontend/src/components/C2TasksPanel.tsx
+++ b/frontend/src/components/C2TasksPanel.tsx
@@ -1,5 +1,6 @@
 import { Fragment, useState } from 'react';
 import { ChevronRight, ChevronDown } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { useC2Tasks } from '@/hooks/useC2';
 import { C2TaskStatusBadge } from './C2TaskStatusBadge';
 
@@ -8,6 +9,7 @@ interface C2TasksPanelProps {
 }
 
 export function C2TasksPanel({ simulationId }: C2TasksPanelProps): JSX.Element {
+  const { t } = useTranslation();
   const query = useC2Tasks(simulationId, { enabled: true });
   const [expandedIds, setExpandedIds] = useState<Set<number>>(new Set());
 
@@ -33,13 +35,13 @@ export function C2TasksPanel({ simulationId }: C2TasksPanelProps): JSX.Element {
       className="card-product flex flex-col gap-md"
     >
       <div className="flex items-center justify-between">
-        <h3 className="text-[16px] font-medium text-ink">C2 Tasks</h3>
+        <h3 className="text-[16px] font-medium text-ink">{t('c2.tasks.title')}</h3>
         {isRefreshing && (
           <span
             data-testid="c2-task-refresh-indicator"
             className="text-[12px] text-graphite"
           >
-            Refreshing…
+            {t('c2.tasks.refreshing')}
           </span>
         )}
       </div>
@@ -47,7 +49,7 @@ export function C2TasksPanel({ simulationId }: C2TasksPanelProps): JSX.Element {
       {tasks.length === 0 ? (
         <div className="border border-hairline rounded-none px-md py-md">
           <p className="text-[14px] text-graphite">
-            No C2 tasks yet. Use Execute via C2 to launch commands.
+            {t('c2.tasks.empty')}
           </p>
         </div>
       ) : (
@@ -56,11 +58,11 @@ export function C2TasksPanel({ simulationId }: C2TasksPanelProps): JSX.Element {
             <thead>
               <tr className="bg-cloud border-b border-hairline">
                 <th className="px-md py-sm text-left font-medium text-ink w-8" aria-label="Expand" />
-                <th className="px-md py-sm text-left font-medium text-ink">Task</th>
-                <th className="px-md py-sm text-left font-medium text-ink">Command</th>
-                <th className="px-md py-sm text-left font-medium text-ink">Source</th>
-                <th className="px-md py-sm text-left font-medium text-ink">Status</th>
-                <th className="px-md py-sm text-left font-medium text-ink">Completed at</th>
+                <th className="px-md py-sm text-left font-medium text-ink">{t('c2.tasks.col.task')}</th>
+                <th className="px-md py-sm text-left font-medium text-ink">{t('c2.tasks.col.command')}</th>
+                <th className="px-md py-sm text-left font-medium text-ink">{t('c2.tasks.col.source')}</th>
+                <th className="px-md py-sm text-left font-medium text-ink">{t('c2.tasks.col.status')}</th>
+                <th className="px-md py-sm text-left font-medium text-ink">{t('c2.tasks.col.completedAt')}</th>
               </tr>
             </thead>
             <tbody>
diff --git a/frontend/src/components/ExecuteViaC2Modal.tsx b/frontend/src/components/ExecuteViaC2Modal.tsx
index 5eee92b..fdae5f1 100644
--- a/frontend/src/components/ExecuteViaC2Modal.tsx
+++ b/frontend/src/components/ExecuteViaC2Modal.tsx
@@ -1,4 +1,5 @@
 import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { extractApiError } from '@/api/client';
 import { useC2Callbacks, useExecuteC2 } from '@/hooks/useC2';
 import { C2CallbackPicker } from './C2CallbackPicker';
@@ -17,6 +18,7 @@ export function ExecuteViaC2Modal({
   initialCommands,
   onClose,
 }: ExecuteViaC2ModalProps): JSX.Element {
+  const { t } = useTranslation();
   const { push } = useToast();
 
   const callbacksQuery = useC2Callbacks(engagementId, { enabled: true });
@@ -43,10 +45,10 @@ export function ExecuteViaC2Modal({
         callback_display_id: selectedId,
         commands: commandLines,
       });
-      push(`${result.tasks.length} task(s) submitted`, 'success');
+      push(t('c2.modal.execute.toast.launched', { count: result.tasks.length }), 'success');
       onClose();
     } catch (err) {
-      setSubmitError(extractApiError(err, 'Could not execute via C2'));
+      setSubmitError(extractApiError(err, t('c2.modal.execute.error.launch')));
     }
   };
 
@@ -62,12 +64,12 @@ export function ExecuteViaC2Modal({
 
       <div className="relative card-product w-full max-w-3xl mx-md flex flex-col gap-md max-h-[90vh] overflow-y-auto">
         <h2 id="c2-modal-title" className="text-[20px] font-medium text-ink">
-          Execute via C2
+          {t('c2.modal.execute.title')}
         </h2>
 
         {/* Callback picker */}
         <div className="flex flex-col gap-xs">
-          <span className="text-[14px] font-medium text-ink">Select callback</span>
+          <span className="text-[14px] font-medium text-ink">{t('c2.modal.execute.callback')}</span>
           <C2CallbackPicker
             callbacks={callbacks}
             isLoading={callbacksQuery.isLoading}
@@ -82,7 +84,7 @@ export function ExecuteViaC2Modal({
         {/* Commands */}
         <div className="flex flex-col gap-xs">
           <label htmlFor="c2-commands" className="text-[14px] font-medium text-ink">
-            Commands
+            {t('simulation.field.commands')}
           </label>
           <textarea
             id="c2-commands"
@@ -90,10 +92,10 @@ export function ExecuteViaC2Modal({
             value={commands}
             onChange={(e) => setCommands(e.target.value)}
             className="text-input min-h-[112px] py-sm font-mono text-[14px]"
-            placeholder="One command per line"
+            placeholder={t('simulation.field.commands')}
           />
           <span className="text-[12px] text-graphite">
-            {commandLines.length} command{commandLines.length !== 1 ? 's' : ''} — one task per line
+            {t('c2.modal.execute.commandCount', { count: commandLines.length })}
           </span>
         </div>
 
@@ -112,7 +114,7 @@ export function ExecuteViaC2Modal({
             onClick={onLaunch}
             disabled={!canLaunch || executeMutation.isPending}
           >
-            {executeMutation.isPending ? 'Launching…' : 'Launch'}
+            {executeMutation.isPending ? t('c2.modal.execute.btn.launching') : t('c2.modal.execute.btn.launch')}
           </button>
           <button
             type="button"
@@ -120,7 +122,7 @@ export function ExecuteViaC2Modal({
             onClick={onClose}
             disabled={executeMutation.isPending}
           >
-            Cancel
+            {t('c2.modal.execute.btn.cancel')}
           </button>
         </div>
       </div>
diff --git a/frontend/src/components/ImportC2HistoryModal.tsx b/frontend/src/components/ImportC2HistoryModal.tsx
index 2fa17e2..0700d72 100644
--- a/frontend/src/components/ImportC2HistoryModal.tsx
+++ b/frontend/src/components/ImportC2HistoryModal.tsx
@@ -1,4 +1,5 @@
 import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { extractApiError } from '@/api/client';
 import { useC2Callbacks, useC2CallbackHistory, useImportC2 } from '@/hooks/useC2';
 import { C2CallbackPicker } from './C2CallbackPicker';
@@ -18,6 +19,7 @@ export function ImportC2HistoryModal({
   engagementId,
   onClose,
 }: ImportC2HistoryModalProps): JSX.Element {
+  const { t } = useTranslation();
   const { push } = useToast();
 
   const callbacksQuery = useC2Callbacks(engagementId, { enabled: true });
@@ -70,12 +72,12 @@ export function ImportC2HistoryModal({
       });
       const msg =
         result.skipped > 0
-          ? `Imported ${result.imported} task(s), ${result.skipped} already attached`
-          : `Imported ${result.imported} task(s)`;
+          ? t('c2.modal.import.toast.partial', { imported: result.imported, skipped: result.skipped })
+          : t('c2.modal.import.toast.imported', { count: result.imported });
       push(msg, 'success');
       onClose();
     } catch (err) {
-      setSubmitError(extractApiError(err, 'Could not import tasks'));
+      setSubmitError(extractApiError(err, t('c2.modal.import.error.import')));
     }
   };
 
@@ -91,12 +93,12 @@ export function ImportC2HistoryModal({
 
       <div className="relative card-product w-full max-w-4xl mx-md flex flex-col gap-md max-h-[90vh] overflow-y-auto">
         <h2 id="c2-import-modal-title" className="text-[20px] font-medium text-ink">
-          Import C2 history
+          {t('c2.modal.import.title')}
         </h2>
 
         {/* Step 1: callback picker */}
         <div className="flex flex-col gap-xs">
-          <span className="text-[14px] font-medium text-ink">Select callback</span>
+          <span className="text-[14px] font-medium text-ink">{t('c2.modal.picker.title')}</span>
           <C2CallbackPicker
             callbacks={callbacks}
             isLoading={callbacksQuery.isLoading}
@@ -112,24 +114,24 @@ export function ImportC2HistoryModal({
         {selectedCallbackId !== null && (
           <div className="flex flex-col gap-xs">
             <span className="text-[14px] font-medium text-ink">
-              Task history{' '}
+              {t('c2.tasks.title')}{' '}
               {total > 0 && (
-                <span className="text-graphite font-normal">({total} total)</span>
+                <span className="text-graphite font-normal">({total} {t('c2.modal.import.total').toLowerCase()})</span>
               )}
             </span>
 
             {historyQuery.isLoading && (
-              <p className="text-[14px] text-graphite">Loading history…</p>
+              <p className="text-[14px] text-graphite">{t('state.loading')}</p>
             )}
 
             {historyQuery.isError && (
               <p className="text-[14px] text-bloom-deep">
-                {extractApiError(historyQuery.error, 'Could not load history')}
+                {extractApiError(historyQuery.error, t('c2.modal.import.error.import'))}
               </p>
             )}
 
             {!historyQuery.isLoading && historyTasks.length === 0 && !historyQuery.isError && (
-              <p className="text-[14px] text-graphite">No task history for this callback.</p>
+              <p className="text-[14px] text-graphite">{t('c2.modal.import.empty')}</p>
             )}
 
             {historyTasks.length > 0 && (
@@ -140,10 +142,10 @@ export function ImportC2HistoryModal({
                       <tr className="bg-cloud border-b border-hairline">
                         <th className="px-md py-sm w-8" aria-label="Select" />
                         <th className="px-md py-sm text-left font-medium text-ink">#</th>
-                        <th className="px-md py-sm text-left font-medium text-ink">Command</th>
-                        <th className="px-md py-sm text-left font-medium text-ink">Status</th>
-                        <th className="px-md py-sm text-left font-medium text-ink">Completed</th>
-                        <th className="px-md py-sm text-left font-medium text-ink">Timestamp</th>
+                        <th className="px-md py-sm text-left font-medium text-ink">{t('c2.tasks.col.command')}</th>
+                        <th className="px-md py-sm text-left font-medium text-ink">{t('c2.tasks.col.status')}</th>
+                        <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.import.col.completed')}</th>
+                        <th className="px-md py-sm text-left font-medium text-ink">{t('c2.modal.import.col.timestamp')}</th>
                       </tr>
                     </thead>
                     <tbody>
@@ -175,7 +177,7 @@ export function ImportC2HistoryModal({
                             <C2TaskStatusBadge status={task.status} />
                           </td>
                           <td className="px-md py-sm text-[14px]">
-                            {task.completed ? 'Yes' : 'No'}
+                            {task.completed ? t('common.yes') : t('common.no')}
                           </td>
                           <td className="px-md py-sm font-mono text-graphite">
                             {task.created_at}
@@ -195,10 +197,10 @@ export function ImportC2HistoryModal({
                     onClick={() => setPage((p) => Math.max(1, p - 1))}
                     disabled={page <= 1}
                   >
-                    Prev
+                    {t('c2.modal.import.prev')}
                   </button>
                   <span>
-                    Page {page} of {totalPages}
+                    {t('c2.modal.import.page')} {page} {t('c2.modal.import.of')} {totalPages}
                   </span>
                   <button
                     type="button"
@@ -207,11 +209,11 @@ export function ImportC2HistoryModal({
                     onClick={() => setPage((p) => Math.min(totalPages, p + 1))}
                     disabled={page >= totalPages}
                   >
-                    Next
+                    {t('c2.modal.import.next')}
                   </button>
                   {checkedIds.size > 0 && (
                     <span className="ml-auto text-ink">
-                      {checkedIds.size} selected
+                      {checkedIds.size} {t('c2.modal.import.selected')}
                     </span>
                   )}
                 </div>
@@ -235,7 +237,7 @@ export function ImportC2HistoryModal({
             onClick={onImport}
             disabled={!canImport || importMutation.isPending}
           >
-            {importMutation.isPending ? 'Importing…' : 'Import selected'}
+            {importMutation.isPending ? t('c2.modal.import.btn.importing') : t('c2.modal.import.btn.import')}
           </button>
           <button
             type="button"
@@ -243,7 +245,7 @@ export function ImportC2HistoryModal({
             onClick={onClose}
             disabled={importMutation.isPending}
           >
-            Cancel
+            {t('c2.modal.import.btn.cancel')}
           </button>
         </div>
       </div>
diff --git a/frontend/src/i18n/fr.json b/frontend/src/i18n/fr.json
index 15fd608..938b9ac 100644
--- a/frontend/src/i18n/fr.json
+++ b/frontend/src/i18n/fr.json
@@ -14,7 +14,9 @@
     "create": "Créer",
     "creating": "Création…",
     "close": "Fermer",
-    "confirm": "Confirmer"
+    "confirm": "Confirmer",
+    "yes": "Oui",
+    "no": "Non"
   },
   "nav": {
     "engagements": "Engagements",
@@ -389,7 +391,7 @@
           "commandsRequired": "Aucune commande à exécuter"
         },
         "toast": {
-          "launched": "Tâche C2 lancée"
+          "launched": "{{count}} tâche(s) C2 lancée(s)"
         },
         "error": {
           "launch": "Impossible de lancer la tâche C2"
@@ -409,9 +411,13 @@
         },
         "selected": "sélectionné(s)",
         "empty": "Aucun historique C2 disponible.",
+        "col": {
+          "timestamp": "Horodatage",
+          "completed": "Terminé"
+        },
         "toast": {
-          "imported": "Historique C2 importé",
-          "partial": "Import partiel"
+          "imported": "{{count}} tâche(s) importée(s)",
+          "partial": "{{imported}} importée(s), {{skipped}} déjà attachée(s)"
         },
         "error": {
           "import": "Impossible d'importer l'historique C2"
@@ -421,7 +427,19 @@
         "title": "Sélectionner un agent",
         "empty": "Aucun agent disponible.",
         "hostnameColon": "Hôte :",
-        "lastCheckinColon": "Dernière connexion :"
+        "lastCheckinColon": "Dernière connexion :",
+        "col": {
+          "displayId": "ID",
+          "active": "Actif",
+          "host": "Hôte",
+          "user": "Utilisateur",
+          "domain": "Domaine",
+          "lastCheckin": "Dernière connexion"
+        },
+        "status": {
+          "active": "Actif",
+          "inactive": "Inactif"
+        }
       }
     }
   },
diff --git a/frontend/tests/components/C2ConfigCard.test.tsx b/frontend/tests/components/C2ConfigCard.test.tsx
index cc6e349..a8d92c7 100644
--- a/frontend/tests/components/C2ConfigCard.test.tsx
+++ b/frontend/tests/components/C2ConfigCard.test.tsx
@@ -57,7 +57,7 @@ describe('C2ConfigCard — with config (has_token=true)', () => {
   it('shows Replace token affordance when has_token=true', async () => {
     renderWithProviders(<C2ConfigCard engagementId={1} />);
     await waitFor(() => {
-      expect(screen.getByText('Replace token')).toBeInTheDocument();
+      expect(screen.getByText('Remplacer le token')).toBeInTheDocument();
     });
     // Token input shows placeholder bullets (readOnly)
     const tokenInput = screen.getByTestId('c2-token-input') as HTMLInputElement;
@@ -75,9 +75,9 @@ describe('C2ConfigCard — with config (has_token=true)', () => {
   it('clicking Replace token makes input editable', async () => {
     renderWithProviders(<C2ConfigCard engagementId={1} />);
     await waitFor(() => {
-      expect(screen.getByText('Replace token')).toBeInTheDocument();
+      expect(screen.getByText('Remplacer le token')).toBeInTheDocument();
     });
-    fireEvent.click(screen.getByText('Replace token'));
+    fireEvent.click(screen.getByText('Remplacer le token'));
     await waitFor(() => {
       const tokenInput = screen.getByTestId('c2-token-input') as HTMLInputElement;
       expect(tokenInput.readOnly).toBeFalsy();
@@ -99,7 +99,7 @@ describe('C2ConfigCard — with config (has_token=true)', () => {
     });
     fireEvent.click(screen.getByTestId('c2-test-btn'));
     await waitFor(() => {
-      expect(screen.getByText('Connected')).toBeInTheDocument();
+      expect(screen.getByText('Connecté')).toBeInTheDocument();
     });
   });
 
@@ -124,7 +124,7 @@ describe('C2ConfigCard — 503 disabled state', () => {
     renderWithProviders(<C2ConfigCard engagementId={1} />);
     await waitFor(() => {
       expect(
-        screen.getByText(/C2 features are disabled/i),
+        screen.getByText(/fonctionnalités C2 sont désactivées/i),
       ).toBeInTheDocument();
     });
     expect(screen.getByTestId('c2-save-btn')).toBeDisabled();
diff --git a/frontend/tests/components/C2TasksPanel.test.tsx b/frontend/tests/components/C2TasksPanel.test.tsx
index b4214aa..2a52b5d 100644
--- a/frontend/tests/components/C2TasksPanel.test.tsx
+++ b/frontend/tests/components/C2TasksPanel.test.tsx
@@ -66,7 +66,7 @@ describe('C2TasksPanel — empty state', () => {
     await waitFor(() => {
       expect(screen.getByTestId('c2-tasks-panel')).toBeInTheDocument();
     });
-    expect(screen.getByText(/No C2 tasks yet/i)).toBeInTheDocument();
+    expect(screen.getByText(/Aucune tâche C2/i)).toBeInTheDocument();
     expect(screen.queryByTestId('c2-task-row')).toBeNull();
   });
 });
diff --git a/frontend/tests/components/ExecuteViaC2Modal.test.tsx b/frontend/tests/components/ExecuteViaC2Modal.test.tsx
index a92d1dc..713e433 100644
--- a/frontend/tests/components/ExecuteViaC2Modal.test.tsx
+++ b/frontend/tests/components/ExecuteViaC2Modal.test.tsx
@@ -66,7 +66,7 @@ describe('ExecuteViaC2Modal', () => {
   it('renders modal with title and callback table', async () => {
     renderModal();
     expect(screen.getByTestId('c2-modal')).toBeInTheDocument();
-    expect(screen.getByText('Execute via C2')).toBeInTheDocument();
+    expect(screen.getByText('Exécuter via C2')).toBeInTheDocument();
     await waitFor(() => {
       expect(screen.getAllByTestId('c2-callback-row')).toHaveLength(2);
     });
@@ -148,7 +148,7 @@ describe('ExecuteViaC2Modal', () => {
     await waitFor(() => {
       expect(screen.getAllByTestId('c2-callback-row')).toHaveLength(2);
     });
-    fireEvent.click(screen.getByRole('button', { name: /cancel/i }));
+    fireEvent.click(screen.getByRole('button', { name: /Annuler/i }));
     expect(onClose).toHaveBeenCalled();
   });
 
diff --git a/frontend/tests/components/ImportC2HistoryModal.test.tsx b/frontend/tests/components/ImportC2HistoryModal.test.tsx
index 58f98d2..237a723 100644
--- a/frontend/tests/components/ImportC2HistoryModal.test.tsx
+++ b/frontend/tests/components/ImportC2HistoryModal.test.tsx
@@ -88,7 +88,7 @@ describe('ImportC2HistoryModal — step 1: callback picker', () => {
   it('renders modal with title and callback rows', async () => {
     renderModal();
     expect(screen.getByTestId('c2-import-modal')).toBeInTheDocument();
-    expect(screen.getByText('Import C2 history')).toBeInTheDocument();
+    expect(screen.getByText("Importer l'historique C2")).toBeInTheDocument();
     await waitFor(() => {
       expect(screen.getAllByTestId('c2-import-callback-row')).toHaveLength(2);
     });
@@ -322,7 +322,7 @@ describe('ImportC2HistoryModal — toast wording', () => {
     fireEvent.click(screen.getByTestId('c2-import-submit-btn'));
 
     await waitFor(() => {
-      expect(screen.getByText('Imported 1 task(s)')).toBeInTheDocument();
+      expect(screen.getByText('1 tâche(s) importée(s)')).toBeInTheDocument();
     });
   });
 
@@ -342,7 +342,7 @@ describe('ImportC2HistoryModal — toast wording', () => {
 
     await waitFor(() => {
       expect(
-        screen.getByText('Imported 0 task(s), 1 already attached'),
+        screen.getByText('0 importée(s), 1 déjà attachée(s)'),
       ).toBeInTheDocument();
     });
   });
@@ -374,7 +374,7 @@ describe('ImportC2HistoryModal — Cancel button', () => {
     await waitFor(() => {
       expect(screen.getAllByTestId('c2-import-callback-row')).toHaveLength(2);
     });
-    fireEvent.click(screen.getByRole('button', { name: /cancel/i }));
+    fireEvent.click(screen.getByRole('button', { name: /Annuler/i }));
     expect(onClose).toHaveBeenCalled();
   });
 });