Reverted language code changes thruout the mod

- Added EID.DefaultLanguageCode

features/eid_api.lua

@@ -122,10 +122,10 @@ local dynamicSpriteCache = {} -- used to store sprite objects of collectible ico
 ---@param id CollectibleType
 ---@param description string
 ---@param itemName string?
----@param language EID_LanguageCode? @Default: "en"
+---@param language EID_LanguageCode? @Default: "en_us"
 function EID:addCollectible(id, description, itemName, language)
 	itemName = itemName or nil
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if id == -1 then
 		EID:WriteErrorMsg("Trying to add collectible description to id = -1, which is not allowed! (Name: "..tostring(itemName).."; Description: "..tostring(description)..")")
 		return
@@ -141,10 +141,10 @@ end
 ---@param id TrinketType
 ---@param description string
 ---@param itemName? string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addTrinket(id, description, itemName, language)
 	itemName = itemName or nil
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if id == -1 then
 		EID:WriteErrorMsg("Trying to add trinket description to id = -1, which is not allowed! (Name: "..tostring(itemName).."; Description: "..tostring(description)..")")
 		return
@@ -157,10 +157,10 @@ end
 ---@param characterId PlayerType
 ---@param description string
 ---@param playerName? string @Default: "Modded Character"
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addCharacterInfo(characterId, description, playerName, language)
 	playerName = playerName or "Modded Character"
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if characterId == -1 then
 		EID:WriteErrorMsg("Trying to add character description to id = -1, which is not allowed! (Name: "..tostring(playerName).."; Description: "..tostring(description)..")")
 		return
@@ -173,14 +173,14 @@ end
 ---@param appendText? string | string[] @Text to be appended onto the description. Can be one string, or a table of two strings; one for doubling and one for tripling
 ---@param numbersToMultiply? number | number[] @The number inside the text that should be multiplied. can be one number, or a table of numbers
 ---@param maxMultiplier? number @Is what tripling (Golden+Mom's Box) should multiply the numbers by, normally 3. If it's less than 2, it also applies to doubling
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 -- Example: My modded trinket gives +0.5 range and when tripled, adds homing instead of tripling the range boost:
 --- ```lua
 --- EID:addGoldenTrinketMetadata(Isaac.GetTrinketIdByName("Cool Trinket"), {"", "Homing tears"}, 0.5, 2)
 --- ```
 function EID:addGoldenTrinketMetadata(id, appendText, numbersToMultiply, maxMultiplier, language)
 	maxMultiplier = maxMultiplier or 3
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 
 	if appendText == "" then appendText = nil
 	elseif type(appendText) == "string" then appendText = {appendText} end
@@ -199,13 +199,13 @@ end
 ---@param appendText? string | string[] @Text to be appended onto the description. Can be one string, or a table of two strings; one for doubling and one for tripling
 ---@param numbersToChange? number | number[] @The number inside the text that gets added towards. can be one number, or a table of numbers
 ---@param additiveValues? number @Table of values that should be added to the number, if its doubled, tripled, or quadrupled
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 -- Example: My modded trinket gives +5 range and when tripled, adds homing instead of tripling the range boost:
 --- ```lua
 --- EID:addGoldenTrinketMetadataAdditive(Isaac.GetTrinketIdByName("Cool Trinket"), {"", "Homing tears"}, 5, {1,2,3})
 --- ```
 function EID:addGoldenTrinketMetadataAdditive(id, appendText, numbersToChange, additiveValues, language)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 
 	if appendText == "" then appendText = nil
 	elseif type(appendText) == "string" then appendText = {appendText} end
@@ -235,10 +235,10 @@ end
 ---@param id Card
 ---@param description string
 ---@param itemName? string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addCard(id, description, itemName, language)
 	itemName = itemName or nil
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if id == -1 then
 		EID:WriteErrorMsg("Trying to add card description to id = -1, which is not allowed! (Name: "..tostring(itemName).."; Description: "..tostring(description)..")")
 		return
@@ -257,10 +257,10 @@ end
 ---@param id PillEffect
 ---@param description string
 ---@param itemName? string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addPill(id, description, itemName, language)
 	itemName = itemName or nil
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if id == -1 then
 		EID:WriteErrorMsg("Trying to add pill description to id = -1, which is not allowed! (Name: "..tostring(itemName).."; Description: "..tostring(description)..")")
 		return
@@ -278,11 +278,11 @@ end
 ---@param id PillEffect
 ---@param description string
 ---@param itemName? string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addHorsePill(id, description, itemName, language)
 	if not EID.isRepentance then return end
 	itemName = itemName or nil
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if id == -1 then
 		EID:WriteErrorMsg("Trying to add horsepill description to id = -1, which is not allowed! (Name: "..tostring(itemName).."; Description: "..tostring(description)..")")
 		return
@@ -306,10 +306,10 @@ end
 ---@param characterId PlayerType
 ---@param description string
 ---@param playerName? string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addBirthright(characterId, description, playerName, language)
 	playerName = playerName or nil
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if characterId == -1 then
 		EID:WriteErrorMsg("Trying to add Birthright description to id = -1, which is not allowed! (Name: "..tostring(characterId).."; Description: "..tostring(description)..")")
 		return
@@ -321,9 +321,9 @@ end
 ---Creates a new transformation with a given unique name and a display name
 ---@param uniqueName string
 ---@param displayName string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:createTransformation(uniqueName, displayName, language)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if EID.CustomTransformations[uniqueName] == nil then
 		EID.CustomTransformations[uniqueName] = {}
 	end
@@ -436,10 +436,10 @@ end
 ---@param subtype? integer @If `nil` or `-1`, it will affect all subtypes of that entity
 ---@param entityName string
 ---@param description string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addEntity(id, variant, subtype, entityName, description, language)
 	subtype = subtype or -1
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if id == EntityType.ENTITY_EFFECT then
 		EID.effectList[variant] = true
 	end
@@ -470,13 +470,13 @@ end
 ---This spell should be added with the "Custom Poop API" library to actually appear in-game.
 ---Example:
 ---```lua
----EID:addCustomPoopSpell("MYPOOP", "I Made This Poop", "{{PoopSpell1}}", "Can be throwed to deal damage", "en")
+---EID:addCustomPoopSpell("MYPOOP", "I Made This Poop", "{{PoopSpell1}}", "Can be throwed to deal damage", "en_us")
 ---```
 ---@param token string @The name of the spell in the Custom Poop API code
 ---@param name string @The name of the spell as it should appear in the description
 ---@param icon string @Markup icon of the poop
 ---@param description string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addCustomPoopSpell(token, name, icon, description, language)
 	EID.descriptions[language]["poopSpells"][token] = {icon, name, description, EID._currentMod}
 end
@@ -764,12 +764,12 @@ end
 function EID:getDescriptionEntry(objTable, objIdentifier, noFallback)
 	if not objIdentifier then
 		if noFallback then return EID.descriptions[EID:getLanguage()][objTable]
-		else return EID.descriptions[EID:getLanguage()][objTable] or EID.descriptions["en"][objTable] end
+		else return EID.descriptions[EID:getLanguage()][objTable] or EID.descriptions[EID.DefaultLanguageCode][objTable] end
 	else
 		local translatedTable = EID.descriptions[EID:getLanguage()][objTable]
 		local description
 		if noFallback then description = translatedTable and translatedTable[objIdentifier]
-		else description = (translatedTable and translatedTable[objIdentifier]) or (EID.descriptions["en"][objTable] and EID.descriptions["en"][objTable][objIdentifier]) end
+		else description = (translatedTable and translatedTable[objIdentifier]) or (EID.descriptions[EID.DefaultLanguageCode][objTable] and EID.descriptions[EID.DefaultLanguageCode][objTable][objIdentifier]) end
 		--Try looking for a -1 that would encompass all subtypes of the variant
 		-- Safety check for if the identifier contains "."(dot) 1-2 times and only contains numbers
 		local strNoDots, numDots = string.gsub(objIdentifier, "%.","")
@@ -796,9 +796,9 @@ end
 ---@return string
 function EID:getDescriptionEntryEnglish(objTable, objID)
 	if not objID then
-		return EID.descriptions["en"][objTable]
+		return EID.descriptions[EID.DefaultLanguageCode][objTable]
 	else
-		return EID.descriptions["en"][objTable] and EID.descriptions["en"][objTable][objID]
+		return EID.descriptions[EID.DefaultLanguageCode][objTable] and EID.descriptions[EID.DefaultLanguageCode][objTable][objID]
 	end
 end
 
@@ -892,7 +892,7 @@ function EID:getTransformationName(id)
 		-- get translated custom name
 		local customTransform = EID.CustomTransformations[id]
 		if customTransform ~= nil then
-			return customTransform[EID:getLanguage()] or customTransform["en"] or id
+			return customTransform[EID:getLanguage()] or customTransform[EID.DefaultLanguageCode] or id
 		end
 		return id
 	end
@@ -909,7 +909,7 @@ function EID:getObjectName(Type, Variant, SubType)
 	local tableEntry = EID:getDescriptionData(Type, Variant, SubType)
 	local name = nil
 	if tableEntry ~= nil then
-		if tableEntry[2] ~= nil and tableEntry[2] ~= "" and tableEntry[2] ~= EID.descriptions["en"][tableName][SubType] then
+		if tableEntry[2] ~= nil and tableEntry[2] ~= "" and tableEntry[2] ~= EID.descriptions[EID.DefaultLanguageCode][tableName][SubType] then
 			name = tableEntry[2]
 		end
 	end
@@ -917,18 +917,18 @@ function EID:getObjectName(Type, Variant, SubType)
 	if tableName == "collectibles" then
 		if EID.itemConfig:GetCollectible(SubType) == nil then return fallbackName end
 		local vanillaName = EID.itemConfig:GetCollectible(SubType).Name
-		local englishName = EID.descriptions["en"][tableName][SubType] and EID.descriptions["en"][tableName][SubType][2]
+		local englishName = EID.descriptions[EID.DefaultLanguageCode][tableName][SubType] and EID.descriptions[EID.DefaultLanguageCode][tableName][SubType][2]
 		return name or (not string.find(vanillaName, "^#") and vanillaName) or englishName or vanillaName
 	elseif tableName == "trinkets" then
 		local adjustedSubtype = EID:getAdjustedSubtype(Type, Variant, SubType)
 		if EID.itemConfig:GetTrinket(adjustedSubtype) == nil then return fallbackName end
 		local vanillaName = EID.itemConfig:GetTrinket(adjustedSubtype).Name
-		local englishName = EID.descriptions["en"][tableName][adjustedSubtype] and EID.descriptions["en"][tableName][adjustedSubtype][2]
+		local englishName = EID.descriptions[EID.DefaultLanguageCode][tableName][adjustedSubtype] and EID.descriptions[EID.DefaultLanguageCode][tableName][adjustedSubtype][2]
 		return name or (not string.find(vanillaName, "^#") and vanillaName) or englishName or vanillaName
 	elseif tableName == "cards" then
 		if EID.itemConfig:GetCard(SubType) == nil then return fallbackName end
 		local vanillaName = EID.itemConfig:GetCard(SubType).Name
-		local englishName = EID.descriptions["en"][tableName][SubType] and EID.descriptions["en"][tableName][SubType][2]
+		local englishName = EID.descriptions[EID.DefaultLanguageCode][tableName][SubType] and EID.descriptions[EID.DefaultLanguageCode][tableName][SubType][2]
 		return name or (not string.find(vanillaName, "^#") and vanillaName) or englishName or vanillaName
 	elseif tableName == "pills" or tableName == "horsepills" then
 		local adjustedSubtype = EID:getAdjustedSubtype(Type, Variant, SubType)
@@ -981,7 +981,7 @@ function EID:getPillName(pillID, isHorsepill)
 	else
 		vanillaName = EID.itemConfig:GetPillEffect(pillID - 1).Name
 	end
-	name = name and name[2] or (not string.find(vanillaName, "^#") and vanillaName) or EID.descriptions["en"][tableName][pillID][2] or vanillaName
+	name = name and name[2] or (not string.find(vanillaName, "^#") and vanillaName) or EID.descriptions[EID.DefaultLanguageCode][tableName][pillID][2] or vanillaName
 	name = string.gsub(name,"I'm Excited!!!","I'm Excited!!") -- prevent markup trigger
 	return name
 end
@@ -1239,7 +1239,7 @@ function EID:getTransformationIcon(str)
 		return EID.InlineIcons["ERROR"]
 	end
 	if tonumber(str) ~= nil then
-		str = EID.descriptions["en"].transformations[tonumber(str + 1)]
+		str = EID.descriptions[EID.DefaultLanguageCode].transformations[tonumber(str + 1)]
 	end
 	local transformSprite = EID:getIcon(str:gsub(" ", ""))
 	if transformSprite[1] == "ERROR" then

features/eid_bagofcrafting.lua

@@ -1150,7 +1150,7 @@ function EID:handleBagOfCraftingRendering(ignoreRefreshRate)
 		-- Nothing in our recipe list passed the test; try checking English names as a backup
 		if #IDsToCheck == 0 then
 			local curLang = EID:getLanguage()
-			EID.Config["Language"] = "en"
+			EID.Config["Language"] = EID.DefaultLanguageCode
 			for _,id in ipairs(sortedIDs) do
 				local searchValid = EID:BoCSCheckItemName(EID:getObjectName(5, 100, id))
 				if (searchValid) then table.insert(IDsToCheck, id) end

features/eid_bagofcrafting_search.lua

@@ -57,7 +57,7 @@ end
 
 EID:AddCallback("EIDCallbacks.SEARCH_NAME_CONVERSION", function(_, searchString)
 	-- TODO : make english search inside ko_kr language setting (priotity low though)
-	if EID:getLanguage() == "ko" then
+	if EID:getLanguage() == "ko_kr" then
 		return EID.engKeystrokeToKor(searchString)
 	end
 end)

features/eid_conditionals_funcs.lua

@@ -20,7 +20,7 @@ end
 -- Optional parameters: replaceText, language, extraTable
 -- Example usage: EID:addCondition(myDevilishItemID, EID.IsGreedMode, "{{GreedMode}} Reduces shop prices by 1 for each optional Nightmare wave completed")
 function EID:addCondition(ID, ownedID, text, replaceText, language, extraTable)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if replaceText then text = {text, replaceText} end
 	local modifierText = newModdedCondition(text, language)
 	if type(ownedID) ~= "function" then
@@ -37,7 +37,7 @@ end
 -- Optional parameters: text2, language, extraTable
 -- Example usage: EID:addSynergyCondition(myHappyLittleItemID, {CollectibleType.COLLECTIBLE_BRIMSTONE, CollectibleType.COLLECTIBLE_SULFUR}, "Turns your laser into a smiley face that charms enemies")
 function EID:addSynergyCondition(ID1, ID2, text1, text2, language, extraTable)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	local modifierText1 = newModdedCondition(text1, language)
 	local modifierText2 = newModdedCondition(text2, language)
 	EID:AddSynergyConditional(ID1, ID2, modifierText1, modifierText2, extraTable)
@@ -49,7 +49,7 @@ end
 -- Optional parameters: replaceText, language, extraTable, includeTainted
 -- Example usage: EID:addPlayerCondition(myAngstyItemID, PlayerType.PLAYER_EVE, "Gives Eve extra mascara (2x Damage multiplier)")
 function EID:addPlayerCondition(ID, playerID, text, replaceText, language, extraTable, includeTainted)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if replaceText then text = {text, replaceText} end
 	local modifierText = newModdedCondition(text, language)
 	EID:AddPlayerConditional(ID, playerID, modifierText, extraTable, includeTainted)
@@ -61,7 +61,7 @@ end
 -- or, if you provide newNumber, it changes numberToDouble to that (technically, it's just a find/replace pair, any strings work)
 -- Example usage: EID:addToGeneralCondition(myVeryHealthyItemID, "bingeEaterBuffs", "↑ {{Speed}} +0.15 Speed#↓ {{Tears}} -0.5 Tears#↓ {{Damage}} -0.5 Damage")
 function EID:addToGeneralCondition(ID, locTable, text, numberToDouble, newNumber, language)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if numberToDouble then
 		newNumber = newNumber or numberToDouble * 2
 		text = { numberToDouble, newNumber, text }
@@ -103,7 +103,7 @@ end
 -- Shortcut function for adding BFFS conditions; this is slightly more complex since it supports trinkets
 -- Example usage: EID:addBFFSCondition(myBasicFamiliarID, nil, 3.5)
 function EID:addBFFSCondition(ID, text, numberToDouble, newNumber, language)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if numberToDouble then
 		newNumber = newNumber or numberToDouble * 2
 		text = { numberToDouble, newNumber, text }
@@ -119,7 +119,7 @@ end
 
 -- Shortcut function for adding Hive Mind conditions; by default, it will show with BFFS too, unless you pass in allowBFFS as false
 function EID:addHiveMindCondition(ID, text, numberToDouble, newNumber, language, allowBFFS)
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 	if allowBFFS == nil then allowBFFS = true end
 	EID.HiveMindFamiliars[ID] = true
 	if not allowBFFS then EID.BFFSIgnore[ID] = true end

features/eid_debugging.lua

@@ -4,7 +4,7 @@ local showDebugChars = false
 
 -- check integrity of language files
 
-local languageFilesToCheck = {"fr"} -- EID.Languages -- single file check example {"ko"}
+local languageFilesToCheck = {"fr"} -- EID.Languages -- single file check example {"ko_kr"}
 
 -- count English entries for stats
 local count = 0
@@ -16,7 +16,7 @@ function EID:countEntries(t)
 		end
 	end
 end
-EID:countEntries(EID.descriptions["en"])
+EID:countEntries(EID.descriptions[EID.DefaultLanguageCode])
 local enUSEntries = count
 EID:WriteDebugMsg("English entries: "..enUSEntries)
 
@@ -84,7 +84,7 @@ for _, lang in ipairs(languageFilesToCheck) do
 	end
 
 	local progress = { 0, 0 }
-	EID:compareTables(EID.descriptions["en"], EID.descriptions[lang], lang, progress)
+	EID:compareTables(EID.descriptions[EID.DefaultLanguageCode], EID.descriptions[lang], lang, progress)
 
 	local errors = (enUSEntries - progress[1])-progress[2]
 	EID:WriteDebugMsg("Errors found: "..errors .." / "..enUSEntries)

features/eid_grid_descriptions.lua

@@ -22,10 +22,10 @@ EID.GridEntityWhitelist = setmetatable({}, {
 ---@param variant integer
 ---@param name string
 ---@param description string
----@param language? EID_LanguageCode @Default: "en"
+---@param language? EID_LanguageCode @Default: "en_us"
 function EID:addGridEntity(type, variant, name, description, language)
 	variant = variant or 0
-	language = language or "en"
+	language = language or EID.DefaultLanguageCode
 
 	EID:CreateDescriptionTableIfMissing("custom", language)
 	EID.descriptions[language].custom["-999." .. type .. "." .. variant] = {
@@ -96,10 +96,10 @@ local function SacrificeRoomCondition(_)
 end
 
 local function SacrificeRoomCallback(descObj)
-	descObj.ObjSubType = math.min(#EID.descriptions["en"].sacrifice, descObj.Entity.VarData + 1)
+	descObj.ObjSubType = math.min(#EID.descriptions[EID.DefaultLanguageCode].sacrifice, descObj.Entity.VarData + 1)
 	-- Get sacrifice name by subtype
 	descObj.Name = EID:getDescriptionEntry("sacrificeHeader") ..
-	" (" .. descObj.ObjSubType .. "/" .. #EID.descriptions["en"].sacrifice .. ")"
+	" (" .. descObj.ObjSubType .. "/" .. #EID.descriptions[EID.DefaultLanguageCode].sacrifice .. ")"
 
 	descObj.Description = EID:getDescriptionEntry("sacrifice", descObj.ObjSubType)[3]
 	local curCounter = descObj.ObjSubType or 1

features/eid_holdmapdesc.lua

@@ -625,7 +625,7 @@ function EID:ItemReminderHandlePoopSpells(player)
 
 					local ignoreExisting = false
 					if customPoop == nil then --If the poop still doesn't exist, use the unkown one instead
-						customPoop = EID:getDescriptionEntry("poopSpells")["Unknown"] or EID.descriptions["en"]["poopSpells"]["Unknown"]
+						customPoop = EID:getDescriptionEntry("poopSpells")["Unknown"] or EID.descriptions[EID.DefaultLanguageCode]["poopSpells"]["Unknown"]
 						ignoreExisting = true
 					end
 

features/eid_language_manager.lua

@@ -1,24 +1,27 @@
+-- Variable that contains the default language code of the mod (English)
+EID.DefaultLanguageCode = "en_us"
+
 -- List of all valid languages
 EID.Languages = {
-    "en", -- English
+    "en_us", -- English
     "fr", -- French
     "pt",   -- Portuguese
     "pt_br", -- Brazilian Portuguese
     "ru", -- Russian
-    "es", -- Spanish
+    "spa", -- Spanish
     "it", -- Italian
-    "bg", -- Bulgarian
+    "bul", -- Bulgarian
     "pl", -- Polish
     "de", -- German
-    "tr", -- Turkish
-    "ko", -- Korean
+    "tr_tr", -- Turkish
+    "ko_kr", -- Korean
     "zh_cn", -- Simplified Chinese
-    "ja", -- Japanese
-    "cs", -- Czech
-    "nl", -- Dutch
-    "uk", -- Ukrainian
-    "el", -- Greek
-    "ro", -- Romanian
+    "ja_jp", -- Japanese
+    "cs_cz", -- Czech
+    "nl_nl", -- Dutch
+    "uk_ua", -- Ukrainian
+    "el_gr", -- Greek
+    "ro_ro", -- Romanian
     "vi" -- Vietnamese
 }
 
@@ -29,36 +32,36 @@ EID.BreakUtf8CharsLanguage = {
 
 --#region Luadoc definitions
 ---@alias EID_LanguageCode
----| "bg" @Bulgarian
----| "cs" @Czech
+---| "bul" @Bulgarian
+---| "cs_cz" @Czech
 ---| "de" @German
----| "el" @Greek
----| "en" @English
----| "es" @Spanish
+---| "el_gr" @Greek
+---| "en_us" @English
+---| "spa" @Spanish
 ---| "fr" @French
 ---| "it" @Italian
----| "ja" @Japanese
----| "ko" @Korean
----| "nl" @Dutch
+---| "ja_jp" @Japanese
+---| "ko_kr" @Korean
+---| "nl_nl" @Dutch
 ---| "pl" @Polish
 ---| "pt_br" @Brasilian Portuguese
 ---| "pt" @Portuguese
----| "ro" @Romanian
+---| "ro_ro" @Romanian
 ---| "ru" @Russian
----| "tr" @Turkish
----| "uk" @Ukrainian
+---| "tr_tr" @Turkish
+---| "uk_ua" @Ukrainian
 ---| "vi" @Vietnamese
 ---| "zh_cn" @Simplified Chinese
 --#endregion
 
 -- Map the game's built-in language option strings to EID's
 EID.LanguageMap = {
-	["jp"] = "ja",
-	["es"] = "es",
+	["jp"] = "ja_jp",
+	["es"] = "spa",
 	["de"] = "de",
 	["fr"] = "fr",
 	["ru"] = "ru",
-	["kr"] = "ko",
+	["kr"] = "ko_kr",
 	["zh"] = "zh_cn",
 }
 
@@ -72,7 +75,7 @@ function EID:getLanguage()
 		lang = "auto"
 	end
 	if lang == "auto" then
-		local langToReturn = Options and EID.LanguageMap[Options.Language] or "en" -- Use game language, if available.
+		local langToReturn = Options and EID.LanguageMap[Options.Language] or EID.DefaultLanguageCode -- Use game language, if available.
 		-- don't do any updating if on a Repentance version before v1.7.9b
 		if Isaac.RunCallback ~= nil then
 			for _, callbackData in pairs(Isaac.GetCallbacks("EID_EVALUATE_AUTO_LANG")) do
@@ -92,7 +95,7 @@ end
 function EID:LoadLanguagePacks(gameVersion)
     --transformation infos
     local _, _ = pcall(require, "descriptions." .. gameVersion .. ".transformations")
-    --languages
+    --load languages
     for _, languageCode in ipairs(EID.Languages) do
         local wasSuccessful, err = pcall(require, "descriptions." .. gameVersion .. "." .. languageCode)
         if not wasSuccessful and not string.find(err, "not found") then

features/eid_tmtrainer.lua

@@ -198,5 +198,5 @@ end
 -- this made more sense when this file was only executed when --luadebug was present
 -- https://www.youtube.com/watch?v=msDuNZyYAIQ
 if (debug and os.date("%m/%d") == "04/01") then
-	EID.descriptions["en"].sacrifice[1][3] = "{{Coin}} 50% chance of winning 1 coin at Sacrifice#75% chance if you're a genetic freak#!!! If you add Kurt Angle to the mix, your chances of winning drastically go down"
+	EID.descriptions[EID.DefaultLanguageCode].sacrifice[1][3] = "{{Coin}} 50% chance of winning 1 coin at Sacrifice#75% chance if you're a genetic freak#!!! If you add Kurt Angle to the mix, your chances of winning drastically go down"
 end