diff --git a/frontend/src/lang/en.js b/frontend/src/lang/en.js
index 6dff994628..83601f6615 100644
--- a/frontend/src/lang/en.js
+++ b/frontend/src/lang/en.js
@@ -992,6 +992,7 @@ export default {
     color_simple: 'Simple',
     not_alpha: 'Opacity',
     area_border_color: 'Map border',
+    area_base_color: 'Base map',
     size: 'Size',
     bar_width: 'Column Width',
     bar_gap: 'Column septum',
diff --git a/frontend/src/lang/tw.js b/frontend/src/lang/tw.js
index f0b75217b6..e03430572a 100644
--- a/frontend/src/lang/tw.js
+++ b/frontend/src/lang/tw.js
@@ -993,6 +993,7 @@ export default {
     color_simple: '簡潔',
     not_alpha: '不透明度',
     area_border_color: '地圖邊線',
+    area_base_color: '底圖',
     size: '大小',
     bar_width: '柱寬',
     bar_gap: '柱間隔',
diff --git a/frontend/src/lang/zh.js b/frontend/src/lang/zh.js
index f2f514e144..6bfd8e0c28 100644
--- a/frontend/src/lang/zh.js
+++ b/frontend/src/lang/zh.js
@@ -992,6 +992,7 @@ export default {
     color_simple: '简洁',
     not_alpha: '不透明度',
     area_border_color: '地图边线',
+    area_base_color: '底图',
     size: '大小',
     bar_width: '柱宽',
     bar_gap: '柱间隔',