diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 21f06f5b6..8c4b83965 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -2,6 +2,7 @@
 
 import hashlib
 import json
+import locale
 import math
 import mimetypes
 import os
@@ -11,7 +12,6 @@ import sys
 import threading
 import time
 import traceback
-import locale
 from collections import defaultdict
 from datetime import datetime
 from json.decoder import JSONDecodeError
@@ -744,15 +744,15 @@ class Coder:
         try:
             lang = locale.getlocale()[0]
             if lang:
-                return lang.split('_')[0]  # Extract just the language code
+                return lang.split("_")[0]  # Extract just the language code
         except:
             pass
-        
-        for env_var in ['LANG', 'LANGUAGE', 'LC_ALL', 'LC_MESSAGES']:
+
+        for env_var in ["LANG", "LANGUAGE", "LC_ALL", "LC_MESSAGES"]:
             lang = os.environ.get(env_var)
             if lang:
-                return lang.split('_')[0]  # Extract just the language code
-        
+                return lang.split("_")[0]  # Extract just the language code
+
         return None
 
     def fmt_system_prompt(self, prompt):
@@ -766,11 +766,14 @@ class Coder:
 
         val = os.getenv(var)
         platform_text += f"- The user's shell: {var}={val}\n"
-        
+
         user_lang = self.get_user_language()
         if user_lang:
-            platform_text += f"- The user's language: {user_lang} (detected from locale or environment variables)\n"
-        
+            platform_text += (
+                f"- The user's language: {user_lang} (detected from locale or environment"
+                " variables)\n"
+            )
+
         dt = datetime.now().isoformat()
         platform_text += f"- The current date/time: {dt}"