diff --git a/locale/es.properties b/locale/es.properties
new file mode 100644
index 0000000..45c3046
--- /dev/null
+++ b/locale/es.properties
@@ -0,0 +1,2 @@
+mod_rpg_name = Mundo RPG
+mod_rpg_desc = Mundo de casillas visto desde arriba al estilo de RPG Maker: tres capas de casillas y una de colisiones, movimiento por cuadrícula con WASD, eventos con la tecla de acción E/F, encuentros aleatorios y combates que vuelven al mapa.
diff --git a/locale/ja.properties b/locale/ja.properties
new file mode 100644
index 0000000..6df8ff0
--- /dev/null
+++ b/locale/ja.properties
@@ -0,0 +1,2 @@
+mod_rpg_name = RPG ワールド
+mod_rpg_desc = RPG Maker 風の見下ろし型タイルワールド：3 つのタイルレイヤーと衝突レイヤー、WASD でのマス目移動、アクションキー E/F のイベント、ランダムエンカウント、マップに戻ってくるバトル。
diff --git a/locale/ko.properties b/locale/ko.properties
new file mode 100644
index 0000000..8aa389a
--- /dev/null
+++ b/locale/ko.properties
@@ -0,0 +1,2 @@
+mod_rpg_name = RPG 월드
+mod_rpg_desc = RPG Maker 스타일의 탑다운 타일 월드: 타일 레이어 3개와 충돌 레이어, WASD 격자 이동, 액션 키 E/F 이벤트, 랜덤 인카운터, 맵으로 돌아오는 전투.
diff --git a/locale/vi.properties b/locale/vi.properties
new file mode 100644
index 0000000..8f7da54
--- /dev/null
+++ b/locale/vi.properties
@@ -0,0 +1,2 @@
+mod_rpg_name = Thế giới RPG
+mod_rpg_desc = Thế giới ô nhìn từ trên xuống theo phong cách RPG Maker: ba lớp ô và một lớp va chạm, di chuyển theo lưới bằng WASD, sự kiện bằng phím hành động E/F, chạm trán ngẫu nhiên và các trận chiến quay về bản đồ.
diff --git a/locale/zh.properties b/locale/zh.properties
new file mode 100644
index 0000000..a62ed95
--- /dev/null
+++ b/locale/zh.properties
@@ -0,0 +1,2 @@
+mod_rpg_name = RPG 世界
+mod_rpg_desc = RPG Maker 风格的俯视瓦片世界：三层瓦片和一层碰撞层，用 WASD 按网格行走，用动作键 E/F 触发事件，随机遇敌，战斗结束后回到地图。
diff --git a/src/Data/RpgMapEvent.cs b/src/Data/RpgMapEvent.cs
index 07c1210..2be16e5 100644
--- a/src/Data/RpgMapEvent.cs
+++ b/src/Data/RpgMapEvent.cs
@@ -73,6 +73,7 @@ namespace Cthangover.Mods.Rpg
         public string File { get; set; }
 
         /// <summary>Effective solidity: explicit value, else whether the event is drawn.</summary>
+        [JsonIgnore]
         public bool IsSolid => Solid ?? (!string.IsNullOrEmpty(Sprite) || Tile >= 0 || !string.IsNullOrEmpty(Icon));
     }
 }
diff --git a/tests/RpgStateTests.cs b/tests/RpgStateTests.cs
index b17a5f5..d6b6073 100644
--- a/tests/RpgStateTests.cs
+++ b/tests/RpgStateTests.cs
@@ -91,6 +91,7 @@ namespace Cthangover.Mods.Rpg.Tests
             ModAssert.Equal("herb != 1", again.Events[1].Condition, "condition");
             ModAssert.Equal("end", again.Events[1].Commands[0], "commands");
             ModAssert.False(text.Contains("some_mod"), "where an event came from is not written");
+            ModAssert.False(text.Contains("IsSolid"), "the computed solidity is not written");
         }
 
         [ModTest("state/event_merge_adds_and_replaces")]