From 20208208bf97651ddd51bed9756e55ab331b0f25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EB=A6=AC=EC=85=B0?=
 <37092106+kohashiwakaba@users.noreply.github.com>
Date: Tue, 13 May 2025 06:16:14 +0900
Subject: [PATCH] add EID_EVALUATE_AUTO_LANG callback (#853)

- this callback is for modders who make unofficial language patches
---
 features/eid_api.lua | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/features/eid_api.lua b/features/eid_api.lua
index 18eeb282..22af5ccb 100644
--- a/features/eid_api.lua
+++ b/features/eid_api.lua
@@ -2324,7 +2324,18 @@ function EID:getLanguage()
 		lang = "auto"
 	end
 	if lang == "auto" then
-		return Options and EID.LanguageMap[Options.Language] or "en_us"
+		local langToReturn = Options and EID.LanguageMap[Options.Language] or "en_us"
+		-- don't do any updating if on a Repentance version before v1.7.9b
+		if Isaac.RunCallback ~= nil then
+			local newLang
+			for _, callbackData in pairs(Isaac.GetCallbacks("EID_EVALUATE_AUTO_LANG")) do
+				local newString = callbackData.Function(callbackData.Mod, langToReturn)
+				if newString and type(newString) == "string" and EID.descriptions[newString] ~= nil then
+					langToReturn = newString
+				end
+			end
+		end
+		return langToReturn
 	end
 	---@cast lang EID_LanguageCode
 	return lang