diff --git a/PKHeX.Core/PKM/PK1.cs b/PKHeX.Core/PKM/PK1.cs
index cece5e2ed..13649a4d7 100644
--- a/PKHeX.Core/PKM/PK1.cs
+++ b/PKHeX.Core/PKM/PK1.cs
@@ -164,7 +164,7 @@ public PK7 ConvertToPK7()
                 Geo1_Country = PKMConverter.Country,
                 Geo1_Region = PKMConverter.Region
             };
-            pk7.Language = GuessedLanguage(PKMConverter.Language);
+            pk7.Language = TransferLanguage(PKMConverter.Language);
             pk7.Nickname = PKX.GetSpeciesNameGeneration(pk7.Species, pk7.Language, pk7.Format);
             if (otname[0] == StringConverter12.G1TradeOTCode) // Ingame Trade
                 pk7.OT_Name = Encounters1.TradeOTG1[pk7.Language];
diff --git a/PKHeX.Core/PKM/PK2.cs b/PKHeX.Core/PKM/PK2.cs
index 7e2dec021..f5dd1f1a8 100644
--- a/PKHeX.Core/PKM/PK2.cs
+++ b/PKHeX.Core/PKM/PK2.cs
@@ -163,7 +163,7 @@ public PK7 ConvertToPK7()
                 Geo1_Country = PKMConverter.Country,
                 Geo1_Region = PKMConverter.Region
             };
-            pk7.Language = GuessedLanguage(PKMConverter.Language);
+            pk7.Language = TransferLanguage(PKMConverter.Language);
             pk7.Nickname = PKX.GetSpeciesNameGeneration(pk7.Species, pk7.Language, pk7.Format);
             if (otname[0] == StringConverter12.G1TradeOTCode) // Ingame Trade
                 pk7.OT_Name = Encounters1.TradeOTG1[pk7.Language];
diff --git a/PKHeX.Core/PKM/Shared/_K12.cs b/PKHeX.Core/PKM/Shared/_K12.cs
index 46c3157f2..8e7a68cd2 100644
--- a/PKHeX.Core/PKM/Shared/_K12.cs
+++ b/PKHeX.Core/PKM/Shared/_K12.cs
@@ -241,6 +241,20 @@ protected int GuessedLanguage(int fallback = (int)LanguageID.English)
             return (int)LanguageID.English;
         }
 
+        /// <summary>
+        /// Tries to guess the source language ID when transferred to future generations (7+)
+        /// </summary>
+        /// <param name="destLanguage">Destination language ID</param>
+        /// <returns>Source language ID</returns>
+        protected int TransferLanguage(int destLanguage)
+        {
+            // if the Species name of the destination language matches the current nickname, transfer with that language.
+            var expect = PKX.GetSpeciesNameGeneration(Species, destLanguage, 2);
+            if (Nickname == expect)
+                return destLanguage;
+            return GuessedLanguage(destLanguage);
+        }
+
         public override ushort[] GetStats(PersonalInfo p)
         {
             var lv = Stat_Level;