diff --git a/src/locales/ca-ES/ability-trigger.ts b/src/locales/ca_ES/ability-trigger.ts
similarity index 100%
rename from src/locales/ca-ES/ability-trigger.ts
rename to src/locales/ca_ES/ability-trigger.ts
diff --git a/src/locales/ca-ES/ability.ts b/src/locales/ca_ES/ability.ts
similarity index 100%
rename from src/locales/ca-ES/ability.ts
rename to src/locales/ca_ES/ability.ts
diff --git a/src/locales/ca-ES/achv.ts b/src/locales/ca_ES/achv.ts
similarity index 100%
rename from src/locales/ca-ES/achv.ts
rename to src/locales/ca_ES/achv.ts
diff --git a/src/locales/ca-ES/arena-flyout.ts b/src/locales/ca_ES/arena-flyout.ts
similarity index 100%
rename from src/locales/ca-ES/arena-flyout.ts
rename to src/locales/ca_ES/arena-flyout.ts
diff --git a/src/locales/ca-ES/arena-tag.ts b/src/locales/ca_ES/arena-tag.ts
similarity index 100%
rename from src/locales/ca-ES/arena-tag.ts
rename to src/locales/ca_ES/arena-tag.ts
diff --git a/src/locales/ca-ES/battle-info.ts b/src/locales/ca_ES/battle-info.ts
similarity index 100%
rename from src/locales/ca-ES/battle-info.ts
rename to src/locales/ca_ES/battle-info.ts
diff --git a/src/locales/ca-ES/battle-message-ui-handler.ts b/src/locales/ca_ES/battle-message-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/battle-message-ui-handler.ts
rename to src/locales/ca_ES/battle-message-ui-handler.ts
diff --git a/src/locales/ca-ES/battle.ts b/src/locales/ca_ES/battle.ts
similarity index 100%
rename from src/locales/ca-ES/battle.ts
rename to src/locales/ca_ES/battle.ts
diff --git a/src/locales/ca-ES/battler-tags.ts b/src/locales/ca_ES/battler-tags.ts
similarity index 100%
rename from src/locales/ca-ES/battler-tags.ts
rename to src/locales/ca_ES/battler-tags.ts
diff --git a/src/locales/ca-ES/berry.ts b/src/locales/ca_ES/berry.ts
similarity index 100%
rename from src/locales/ca-ES/berry.ts
rename to src/locales/ca_ES/berry.ts
diff --git a/src/locales/ca-ES/bgm-name.ts b/src/locales/ca_ES/bgm-name.ts
similarity index 100%
rename from src/locales/ca-ES/bgm-name.ts
rename to src/locales/ca_ES/bgm-name.ts
diff --git a/src/locales/ca-ES/biome.ts b/src/locales/ca_ES/biome.ts
similarity index 100%
rename from src/locales/ca-ES/biome.ts
rename to src/locales/ca_ES/biome.ts
diff --git a/src/locales/ca-ES/challenges.ts b/src/locales/ca_ES/challenges.ts
similarity index 100%
rename from src/locales/ca-ES/challenges.ts
rename to src/locales/ca_ES/challenges.ts
diff --git a/src/locales/ca-ES/command-ui-handler.ts b/src/locales/ca_ES/command-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/command-ui-handler.ts
rename to src/locales/ca_ES/command-ui-handler.ts
diff --git a/src/locales/ca-ES/common.ts b/src/locales/ca_ES/common.ts
similarity index 100%
rename from src/locales/ca-ES/common.ts
rename to src/locales/ca_ES/common.ts
diff --git a/src/locales/ca-ES/config.ts b/src/locales/ca_ES/config.ts
similarity index 100%
rename from src/locales/ca-ES/config.ts
rename to src/locales/ca_ES/config.ts
diff --git a/src/locales/ca-ES/dialogue.ts b/src/locales/ca_ES/dialogue.ts
similarity index 100%
rename from src/locales/ca-ES/dialogue.ts
rename to src/locales/ca_ES/dialogue.ts
diff --git a/src/locales/ca-ES/egg.ts b/src/locales/ca_ES/egg.ts
similarity index 100%
rename from src/locales/ca-ES/egg.ts
rename to src/locales/ca_ES/egg.ts
diff --git a/src/locales/ca-ES/fight-ui-handler.ts b/src/locales/ca_ES/fight-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/fight-ui-handler.ts
rename to src/locales/ca_ES/fight-ui-handler.ts
diff --git a/src/locales/ca-ES/filter-bar.ts b/src/locales/ca_ES/filter-bar.ts
similarity index 100%
rename from src/locales/ca-ES/filter-bar.ts
rename to src/locales/ca_ES/filter-bar.ts
diff --git a/src/locales/ca-ES/game-mode.ts b/src/locales/ca_ES/game-mode.ts
similarity index 100%
rename from src/locales/ca-ES/game-mode.ts
rename to src/locales/ca_ES/game-mode.ts
diff --git a/src/locales/ca-ES/game-stats-ui-handler.ts b/src/locales/ca_ES/game-stats-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/game-stats-ui-handler.ts
rename to src/locales/ca_ES/game-stats-ui-handler.ts
diff --git a/src/locales/ca-ES/growth.ts b/src/locales/ca_ES/growth.ts
similarity index 100%
rename from src/locales/ca-ES/growth.ts
rename to src/locales/ca_ES/growth.ts
diff --git a/src/locales/ca-ES/menu-ui-handler.ts b/src/locales/ca_ES/menu-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/menu-ui-handler.ts
rename to src/locales/ca_ES/menu-ui-handler.ts
diff --git a/src/locales/ca-ES/menu.ts b/src/locales/ca_ES/menu.ts
similarity index 100%
rename from src/locales/ca-ES/menu.ts
rename to src/locales/ca_ES/menu.ts
diff --git a/src/locales/ca-ES/modifier-select-ui-handler.ts b/src/locales/ca_ES/modifier-select-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/modifier-select-ui-handler.ts
rename to src/locales/ca_ES/modifier-select-ui-handler.ts
diff --git a/src/locales/ca-ES/modifier-type.ts b/src/locales/ca_ES/modifier-type.ts
similarity index 100%
rename from src/locales/ca-ES/modifier-type.ts
rename to src/locales/ca_ES/modifier-type.ts
diff --git a/src/locales/ca-ES/modifier.ts b/src/locales/ca_ES/modifier.ts
similarity index 100%
rename from src/locales/ca-ES/modifier.ts
rename to src/locales/ca_ES/modifier.ts
diff --git a/src/locales/ca-ES/move-trigger.ts b/src/locales/ca_ES/move-trigger.ts
similarity index 100%
rename from src/locales/ca-ES/move-trigger.ts
rename to src/locales/ca_ES/move-trigger.ts
diff --git a/src/locales/ca-ES/move.ts b/src/locales/ca_ES/move.ts
similarity index 100%
rename from src/locales/ca-ES/move.ts
rename to src/locales/ca_ES/move.ts
diff --git a/src/locales/ca-ES/nature.ts b/src/locales/ca_ES/nature.ts
similarity index 100%
rename from src/locales/ca-ES/nature.ts
rename to src/locales/ca_ES/nature.ts
diff --git a/src/locales/ca-ES/party-ui-handler.ts b/src/locales/ca_ES/party-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/party-ui-handler.ts
rename to src/locales/ca_ES/party-ui-handler.ts
diff --git a/src/locales/ca-ES/pokeball.ts b/src/locales/ca_ES/pokeball.ts
similarity index 100%
rename from src/locales/ca-ES/pokeball.ts
rename to src/locales/ca_ES/pokeball.ts
diff --git a/src/locales/ca-ES/pokemon-form.ts b/src/locales/ca_ES/pokemon-form.ts
similarity index 100%
rename from src/locales/ca-ES/pokemon-form.ts
rename to src/locales/ca_ES/pokemon-form.ts
diff --git a/src/locales/ca-ES/pokemon-info-container.ts b/src/locales/ca_ES/pokemon-info-container.ts
similarity index 100%
rename from src/locales/ca-ES/pokemon-info-container.ts
rename to src/locales/ca_ES/pokemon-info-container.ts
diff --git a/src/locales/ca-ES/pokemon-info.ts b/src/locales/ca_ES/pokemon-info.ts
similarity index 100%
rename from src/locales/ca-ES/pokemon-info.ts
rename to src/locales/ca_ES/pokemon-info.ts
diff --git a/src/locales/ca-ES/pokemon-summary.ts b/src/locales/ca_ES/pokemon-summary.ts
similarity index 100%
rename from src/locales/ca-ES/pokemon-summary.ts
rename to src/locales/ca_ES/pokemon-summary.ts
diff --git a/src/locales/ca-ES/pokemon.ts b/src/locales/ca_ES/pokemon.ts
similarity index 100%
rename from src/locales/ca-ES/pokemon.ts
rename to src/locales/ca_ES/pokemon.ts
diff --git a/src/locales/ca-ES/save-slot-select-ui-handler.ts b/src/locales/ca_ES/save-slot-select-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/save-slot-select-ui-handler.ts
rename to src/locales/ca_ES/save-slot-select-ui-handler.ts
diff --git a/src/locales/ca-ES/settings.ts b/src/locales/ca_ES/settings.ts
similarity index 100%
rename from src/locales/ca-ES/settings.ts
rename to src/locales/ca_ES/settings.ts
diff --git a/src/locales/ca-ES/splash-messages.ts b/src/locales/ca_ES/splash-messages.ts
similarity index 100%
rename from src/locales/ca-ES/splash-messages.ts
rename to src/locales/ca_ES/splash-messages.ts
diff --git a/src/locales/ca-ES/starter-select-ui-handler.ts b/src/locales/ca_ES/starter-select-ui-handler.ts
similarity index 100%
rename from src/locales/ca-ES/starter-select-ui-handler.ts
rename to src/locales/ca_ES/starter-select-ui-handler.ts
diff --git a/src/locales/ca-ES/status-effect.ts b/src/locales/ca_ES/status-effect.ts
similarity index 100%
rename from src/locales/ca-ES/status-effect.ts
rename to src/locales/ca_ES/status-effect.ts
diff --git a/src/locales/ca-ES/trainers.ts b/src/locales/ca_ES/trainers.ts
similarity index 100%
rename from src/locales/ca-ES/trainers.ts
rename to src/locales/ca_ES/trainers.ts
diff --git a/src/locales/ca-ES/tutorial.ts b/src/locales/ca_ES/tutorial.ts
similarity index 100%
rename from src/locales/ca-ES/tutorial.ts
rename to src/locales/ca_ES/tutorial.ts
diff --git a/src/locales/ca-ES/voucher.ts b/src/locales/ca_ES/voucher.ts
similarity index 100%
rename from src/locales/ca-ES/voucher.ts
rename to src/locales/ca_ES/voucher.ts
diff --git a/src/locales/ca-ES/weather.ts b/src/locales/ca_ES/weather.ts
similarity index 100%
rename from src/locales/ca-ES/weather.ts
rename to src/locales/ca_ES/weather.ts
diff --git a/src/plugins/i18n.ts b/src/plugins/i18n.ts
index 82cde7cd2ad..33f00d22555 100644
--- a/src/plugins/i18n.ts
+++ b/src/plugins/i18n.ts
@@ -2,7 +2,7 @@ import i18next from "i18next";
 import LanguageDetector from "i18next-browser-languagedetector";
 import processor, { KoreanPostpositionProcessor } from "i18next-korean-postposition-processor";
 
-import { caESConfig} from "#app/locales/ca-ES/config.js";
+import { caESConfig} from "#app/locales/ca_ES/config.js";
 import { deConfig } from "#app/locales/de/config.js";
 import { enConfig } from "#app/locales/en/config.js";
 import { esConfig } from "#app/locales/es/config.js";