diff --git a/README.md b/README.md
index 897e995..796a958 100644
--- a/README.md
+++ b/README.md
@@ -610,6 +610,42 @@ The fonts are automatically installed and configured system-wide through the nix
 
 ## 🌟 Specialized Tools
 
+### 📖 Offline Dictionary: sdcv
+
+**Configuration**: `modules/dictionary.nix`  
+**Purpose**: Command-line offline dictionary system with English and Japanese dictionaries
+
+A declarative offline dictionary system using sdcv (StarDict Console Version):
+
+#### Key Features:
+- **Complete Offline Access**: No internet required for dictionary lookups
+- **Multiple Dictionary Types**: English-English, Japanese-English, and English-Japanese
+- **Declarative Downloads**: Dictionary files automatically downloaded and configured
+- **Shell Integration**: Convenient aliases for different dictionary types
+- **Reproducible Setup**: Dictionary configuration managed through Nix
+
+#### Available Dictionary Aliases:
+```bash
+# English-English dictionary (primary)
+def word                    # Look up English word
+define word                 # Same as def
+
+# Japanese-English dictionary
+j2e 単語                    # Short alias for Japanese-English
+e2j word                    # English to Japanese lookup
+
+# Utility commands
+dict-list                   # List all available dictionaries
+dict-setup                  # Manually download/setup dictionary files
+dict-disable-auto-setup     # Disable automatic dictionary setup
+```
+
+#### Features:
+- **Automatic Download**: Dictionary files downloaded from archive.org sources
+- **Smart Caching**: Files only downloaded once, marked as extracted
+- **Environment Integration**: `STARDICT_DATA_DIR` configured automatically
+- **Multiple Formats**: Supports .ifo, .dict, and .idx StarDict format files
+
 ### 📚 Reference Management: papis
 
 **Purpose**: Command-line reference manager for academic papers and documents
diff --git a/hosts/darwin/home-default.nix b/hosts/darwin/home-default.nix
index 0789921..1579f55 100644
--- a/hosts/darwin/home-default.nix
+++ b/hosts/darwin/home-default.nix
@@ -16,6 +16,7 @@
     ../../modules/firefox.nix
     ../../modules/ghostty.nix
     ../../modules/syncthing.nix
+    ../../modules/dictionary.nix
     ../../config/fonts.nix
   ];
 
@@ -39,6 +40,7 @@
     git-credential-oauth
     zoxide
     delta
+    fastfetch
 
     # macOS-specific GUI applications
     maccy          # Clipboard manager (macOS-only)
diff --git a/modules/dictionary.nix b/modules/dictionary.nix
new file mode 100644
index 0000000..be55e46
--- /dev/null
+++ b/modules/dictionary.nix
@@ -0,0 +1,76 @@
+{ pkgs, ... }:
+
+let
+  # Create dictionary setup script that downloads and extracts dictionaries
+  setupDictionaries = pkgs.writeShellScript "setup-dictionaries" ''
+    # Create dictionary directory
+    mkdir -p "$HOME/.stardict/dic"
+    
+    # Function to download and extract dictionary
+    download_dict() {
+      local url="$1"
+      local filename="$2"
+      local extract_dir="$HOME/.stardict/dic"
+      
+      if [ ! -f "$extract_dir/.$(basename $filename)-extracted" ]; then
+        echo "Downloading $filename..."
+        if ${pkgs.curl}/bin/curl -L -o "/tmp/$filename" "$url"; then
+          echo "Extracting $filename..."
+          ${pkgs.gnutar}/bin/tar -xf "/tmp/$filename" -C "$extract_dir" --strip-components=1 2>/dev/null || \
+          ${pkgs.gnutar}/bin/tar -xf "/tmp/$filename" -C "$extract_dir" 2>/dev/null || true
+          
+          # Clean up
+          rm -f "/tmp/$filename"
+          touch "$extract_dir/.$(basename $filename)-extracted"
+          echo "$filename setup complete!"
+        else
+          echo "Failed to download $filename"
+        fi
+      fi
+    }
+    
+    # Download dictionaries (using working URLs)
+    download_dict "https://web.archive.org/web/20200702203642/http://download.huzheng.org/dict.org/stardict-dictd_www.dict.org_gcide-2.4.2.tar.bz2" "gcide-dict.tar.bz2"
+    download_dict "https://cyphar.github.io/jpn-stardicts/JMdict-ja-en.tar.gz" "jmdict-ja-en.tar.gz"
+    
+    echo "Dictionary setup process completed!"
+  '';
+
+in
+{
+  home.packages = with pkgs; [
+    sdcv
+    curl       # For downloading dictionaries
+    gnutar     # For extracting dictionaries
+  ];
+
+  # Environment variable for dictionary location
+  home.sessionVariables = {
+    STARDICT_DATA_DIR = "$HOME/.stardict/dic";
+  };
+
+  # Note: Dictionary files will be downloaded automatically when you first run 'dict-setup'
+  # or you can run the setup manually at any time
+
+  # Shell aliases for different dictionary types
+  programs.zsh.shellAliases = {
+    # English-English dictionary
+    "def" = "sdcv";
+    "define" = "sdcv";
+
+    # Japanese-English dictionary
+    "j2e" = "sdcv -u JMdict-ja-en";
+    
+    # English-Japanese dictionary (same as Japanese-English - JMdict is bidirectional)
+    "e2j" = "sdcv -u JMdict-ja-en";
+    
+    # List available dictionaries
+    "dict-list" = "sdcv -l";
+    
+    # Manual dictionary setup
+    "dict-setup" = toString setupDictionaries;
+    
+    # Disable auto-setup for future activations
+    "dict-disable-auto-setup" = "touch $HOME/.stardict/.skip-auto-setup";
+  };
+}