diff --git a/src/asset/asset.c b/src/asset/asset.c
index 38d63a0..c5804b9 100644
--- a/src/asset/asset.c
+++ b/src/asset/asset.c
@@ -94,8 +94,14 @@ errorret_t assetLoad(const char_t *filename, void *output) {
       errorChain(ret);
       break;
 
-    case ASSET_LOAD_STRAT_TEST:
-      assertUnreachable("Asset load strategy not implemented yet.");
+    case ASSET_LOAD_STRAT_CUSTOM:
+      assertNotNull(def->custom, "Asset load function cannot be NULL.");
+      assetcustom_t customData = {
+        .zipFile = file,
+        .output = output
+      };
+      errorChain(def->custom(&customData));
+      break;
 
     default:
       assertUnreachable("Unknown asset load strategy.");
diff --git a/src/asset/asset.h b/src/asset/asset.h
index 1469af2..571a0fa 100644
--- a/src/asset/asset.h
+++ b/src/asset/asset.h
@@ -7,7 +7,7 @@
 
 #pragma once
 #include "error/error.h"
-#include <zip.h>
+#include "assettype.h"
 
 #if ASSET_TYPE == wad
 #else
diff --git a/src/asset/assettype.h b/src/asset/assettype.h
index 4c1b27c..5b81029 100644
--- a/src/asset/assettype.h
+++ b/src/asset/assettype.h
@@ -8,6 +8,8 @@
 #pragma once
 #include "type/assetpaletteimage.h"
 #include "type/assetalphaimage.h"
+#include "type/assetlanguage.h"
+#include <zip.h>
 
 typedef enum {
   ASSET_TYPE_NULL,
@@ -19,18 +21,21 @@ typedef enum {
 
 typedef enum {
   ASSET_LOAD_STRAT_ENTIRE,
-  ASSET_LOAD_STRAT_TEST
+  ASSET_LOAD_STRAT_CUSTOM
 } assetloadstrat_t;
 
+typedef struct assetcustom_s {
+  zip_file_t *zipFile;
+  void *output;
+} assetcustom_t;
+
 typedef struct {
   const char_t *header;
   const size_t dataSize;
   const assetloadstrat_t loadStrategy;
   union {
     errorret_t (*entire)(void *data, void *output);
-    struct {
-      void *test;
-    } test;
+    errorret_t (*custom)(assetcustom_t *custom);
   };
 } assettypedef_t;
 
@@ -55,10 +60,7 @@ static const assettypedef_t ASSET_TYPE_DEFINITIONS[ASSET_TYPE_COUNT] = {
 
   [ASSET_TYPE_LANGUAGE] = {
     .header = "DLF",
-    .loadStrategy = ASSET_LOAD_STRAT_TEST,
-    .dataSize = 0, // Variable size
-    .test = {
-      .test = NULL
-    }
+    .loadStrategy = ASSET_LOAD_STRAT_CUSTOM,
+    .custom = assetLanguageInit
   }
 };
\ No newline at end of file
diff --git a/src/asset/type/CMakeLists.txt b/src/asset/type/CMakeLists.txt
index ba07c92..1b37565 100644
--- a/src/asset/type/CMakeLists.txt
+++ b/src/asset/type/CMakeLists.txt
@@ -8,4 +8,5 @@ target_sources(${DUSK_TARGET_NAME}
   PRIVATE
     assetalphaimage.c
     assetpaletteimage.c
+    assetlanguage.c
 )
\ No newline at end of file
diff --git a/src/asset/type/assetlanguage.c b/src/asset/type/assetlanguage.c
index e692be1..6e449cd 100644
--- a/src/asset/type/assetlanguage.c
+++ b/src/asset/type/assetlanguage.c
@@ -5,4 +5,10 @@
  * https://opensource.org/licenses/MIT
  */
 
-#include "assetlanguage.h"
\ No newline at end of file
+#include "asset/asset.h"
+
+errorret_t assetLanguageInit(assetcustom_t *custom) {
+  zip_fclose(custom->zipFile);
+
+  errorOk();
+}
\ No newline at end of file
diff --git a/src/asset/type/assetlanguage.h b/src/asset/type/assetlanguage.h
index 451eb7b..f0c62d2 100644
--- a/src/asset/type/assetlanguage.h
+++ b/src/asset/type/assetlanguage.h
@@ -6,6 +6,7 @@
  */
 
 #pragma once
+#include "error/error.h"
 #include "locale/language/keys.h"
 
 #define ASSET_LANG_CHUNK_CHAR_COUNT 6 * 1024 // 6 KB per chunk
@@ -26,4 +27,14 @@ typedef struct {
 typedef struct {
   assetlanguagestring_t strings[LANG_KEY_COUNT];
 } assetlanguageheader_t;
-#pragma pack(pop)
\ No newline at end of file
+#pragma pack(pop)
+
+typedef struct assetcustom_s assetcustom_t;
+
+/**
+ * Receiving function from the asset manager to initialize language assets.
+ * 
+ * @param custom Pointer to custom asset loading data.
+ * @return Error code.
+ */
+errorret_t assetLanguageInit(assetcustom_t *custom);
\ No newline at end of file