extended admin tool for finished lessons

frontend/src/i18n/locales/en/admin.json

@@ -45,6 +45,16 @@
             "loadCoursesError": "Could not load the course list.",
             "loadingLessons": "Loading lessons…"
         },
+        "vocabLessonMarkComplete": {
+            "divider": "Repair progress (does not fabricate exercise answers)",
+            "throughLabel": "All lessons up to and including lesson number",
+            "hint": "Marks missing or open rows as completed, including target score and first review wave. Already completed lessons are left unchanged.",
+            "submit": "Mark through here as completed",
+            "confirm": "Mark every lesson with number ≤ {n} for {username} in this course as completed?",
+            "success": "{marked} lesson(s) newly marked complete ({unchanged} were already done).",
+            "successNone": "No change: all affected lessons ({unchanged}) were already completed.",
+            "error": "Could not mark lessons complete."
+        },
         "adultVerification": {
             "title": "[Admin] - Erotic approvals",
             "intro": "Adult users can request access to the erotic area. Requests can be reviewed, approved or rejected here.",