now lang id is correctly got from fp_config[locale][lang];

todo: check encoding!

admin/panels/config/admin.config.php

@@ -65,8 +65,6 @@
 				'theme'	=> $fp_config['general']['theme'],
 				'style'	=> @$fp_config['general']['style'],
 				'blogid' => $fp_config['general']['blogid'],
-				
-				 'lang'	=> 'en-us',
 				'charset'=> 'utf-8',
 	
 			);

fp-defaults/settings-defaults.php

@@ -15,7 +15,6 @@ $fp_config = array (
     'theme' => 'leggero',
     'style' => 'leggero',
     'blogid' => 'fpdefid',
-    'lang' => 'en-us',
     'charset' => 'utf-8',
   ),
   'locale' => 

fp-includes/core/core.language.php

@@ -28,7 +28,7 @@
 			
 		}
 		
-		$fpath=LANG_DIR."{$fp_config['general']['lang']}/$file";
+		$fpath=LANG_DIR."{$fp_config['locale']['lang']}/$file";
 		$fallback=LANG_DIR.LANG_DEFAULT."/$file";