feat(i18n): fill the translation backlog and add the new strings

40 keys existed only in app_es.arb and fell back to Spanish everywhere else
(15 of them in English). Most were multi-device screens: hostGame, votar,
clueIs, whoDoYouThinkIsTheImpostor, waitingPlayersSeeWord.

Adds those plus the new keys for impostor awareness, the adjusted impostor
count, the eliminated-player notice and the reconnection screen.

51 keys across the 18 supported languages.

lib/l10n/app_es.arb

@@ -385,5 +385,37 @@
         "type": "String"
       }
     }
+  },
+  "impostorsKnowEachOther": "🎭 Los impostores se conocen",
+  "impostorsKnowEachOtherDescription": "Cada impostor verá los nombres del resto",
+  "impostorsKnowEachOtherNeedsTwo": "Solo se aplica con 2 o más impostores",
+  "otherImpostorsTitle": "{count, plural, =1{El otro impostor} other{Los otros impostores}}",
+  "@otherImpostorsTitle": {
+    "placeholders": {
+      "count": {
+        "type": "num"
+      }
+    }
+  },
+  "youAreTheOnlyImpostor": "Eres el único impostor",
+  "impostorsAdjusted": "Impostores ajustados a {count} por el número de jugadores",
+  "@impostorsAdjusted": {
+    "placeholders": {
+      "count": {
+        "type": "int"
+      }
+    }
+  },
+  "eliminatedCannotVote": "Estás eliminado: ya no votas",
+  "reconnecting": "Reconectando...",
+  "reconnectingHint": "Se perdió la conexión con el host. Tu sitio en la partida se mantiene.",
+  "leaveGame": "Salir de la partida",
+  "playerRejoined": "{name} ha vuelto a la partida",
+  "@playerRejoined": {
+    "placeholders": {
+      "name": {
+        "type": "String"
+      }
+    }
   }
 }