diff --git a/public/images/types_pt_BR.json b/public/images/types_pt-BR.json
similarity index 99%
rename from public/images/types_pt_BR.json
rename to public/images/types_pt-BR.json
index 932d316fd30..e89bdcba87f 100644
--- a/public/images/types_pt_BR.json
+++ b/public/images/types_pt-BR.json
@@ -1,7 +1,7 @@
 {
 	"textures": [
 		{
-			"image": "types_pt_BR.png",
+			"image": "types_pt-BR.png",
 			"format": "RGBA8888",
 			"size": {
 				"w": 32,
diff --git a/public/images/types_pt_BR.png b/public/images/types_pt-BR.png
similarity index 100%
rename from public/images/types_pt_BR.png
rename to public/images/types_pt-BR.png
diff --git a/public/images/types_zh_CN.json b/public/images/types_zh-CN.json
similarity index 99%
rename from public/images/types_zh_CN.json
rename to public/images/types_zh-CN.json
index 4cd0135a677..e82d3c56468 100644
--- a/public/images/types_zh_CN.json
+++ b/public/images/types_zh-CN.json
@@ -1,7 +1,7 @@
 {
 	"textures": [
 		{
-			"image": "types_zh_CN.png",
+			"image": "types_zh-CN.png",
 			"format": "RGBA8888",
 			"size": {
 				"w": 32,
diff --git a/public/images/types_zh_CN.png b/public/images/types_zh-CN.png
similarity index 100%
rename from public/images/types_zh_CN.png
rename to public/images/types_zh-CN.png
diff --git a/public/images/types_zh_TW.json b/public/images/types_zh-TW.json
similarity index 99%
rename from public/images/types_zh_TW.json
rename to public/images/types_zh-TW.json
index e3923b00f02..18c51ab61f4 100644
--- a/public/images/types_zh_TW.json
+++ b/public/images/types_zh-TW.json
@@ -1,7 +1,7 @@
 {
 	"textures": [
 		{
-			"image": "types_zh_TW.png",
+			"image": "types_zh-TW.png",
 			"format": "RGBA8888",
 			"size": {
 				"w": 32,
diff --git a/public/images/types_zh_TW.png b/public/images/types_zh-TW.png
similarity index 100%
rename from public/images/types_zh_TW.png
rename to public/images/types_zh-TW.png
diff --git a/public/images/ui/legacy/summary_moves_effect_pt_BR.png b/public/images/ui/legacy/summary_moves_effect_pt-BR.png
similarity index 100%
rename from public/images/ui/legacy/summary_moves_effect_pt_BR.png
rename to public/images/ui/legacy/summary_moves_effect_pt-BR.png
diff --git a/public/images/ui/legacy/summary_moves_effect_zh_CN.png b/public/images/ui/legacy/summary_moves_effect_zh-CN.png
similarity index 100%
rename from public/images/ui/legacy/summary_moves_effect_zh_CN.png
rename to public/images/ui/legacy/summary_moves_effect_zh-CN.png
diff --git a/src/utils.ts b/src/utils.ts
index 6667d2522f5..9fe9cc9096f 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -450,9 +450,9 @@ export function verifyLang(lang?: string): boolean {
   case "fr":
   case "de":
   case "it":
-  case "zh_CN":
-  case "zh_TW":
-  case "pt_BR":
+  case "zh-CN":
+  case "zh-TW":
+  case "pt-BR":
   case "ko":
     return true;
   default: