diff --git a/system/language/chinese_simplified/calendar_lang.php b/system/language/chinese_simplified/calendar_lang.php
new file mode 100644
index 00000000..f542f77c
--- /dev/null
+++ b/system/language/chinese_simplified/calendar_lang.php
@@ -0,0 +1,56 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['cal_su']			= 'Su';
+$lang['cal_mo']			= 'Mo';
+$lang['cal_tu']			= 'Tu';
+$lang['cal_we']			= 'We';
+$lang['cal_th']			= 'Th';
+$lang['cal_fr']			= 'Fr';
+$lang['cal_sa']			= 'Sa';
+$lang['cal_sun']		= 'Sun';
+$lang['cal_mon']		= 'Mon';
+$lang['cal_tue']		= 'Tue';
+$lang['cal_wed']		= 'Wed';
+$lang['cal_thu']		= 'Thu';
+$lang['cal_fri']		= 'Fri';
+$lang['cal_sat']		= 'Sat';
+$lang['cal_sunday']		= '星期天';
+$lang['cal_monday']		= '星期一';
+$lang['cal_tuesday']	= '星期二';
+$lang['cal_wednesday']	= '星期三';
+$lang['cal_thursday']	= '星期四';
+$lang['cal_friday']		= '星期五';
+$lang['cal_saturday']	= '星期六';
+$lang['cal_jan']		= 'Jan';
+$lang['cal_feb']		= 'Feb';
+$lang['cal_mar']		= 'Mar';
+$lang['cal_apr']		= 'Apr';
+$lang['cal_may']		= 'May';
+$lang['cal_jun']		= 'Jun';
+$lang['cal_jul']		= 'Jul';
+$lang['cal_aug']		= 'Aug';
+$lang['cal_sep']		= 'Sep';
+$lang['cal_oct']		= 'Oct';
+$lang['cal_nov']		= 'Nov';
+$lang['cal_dec']		= 'Dec';
+$lang['cal_january']	= '一月';
+$lang['cal_february']	= '二月';
+$lang['cal_march']		= '三月';
+$lang['cal_april']		= '四月';
+$lang['cal_mayl']		= '五月';
+$lang['cal_june']		= '六月';
+$lang['cal_july']		= '七月';
+$lang['cal_august']		= '八月';
+$lang['cal_september']	= '九月';
+$lang['cal_october']	= '十月';
+$lang['cal_november']	= '十一月';
+$lang['cal_december']	= '十二月';
diff --git a/system/language/chinese_simplified/date_lang.php b/system/language/chinese_simplified/date_lang.php
new file mode 100644
index 00000000..7dcd1ec4
--- /dev/null
+++ b/system/language/chinese_simplified/date_lang.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['date_year'] = '年';
+$lang['date_years'] = '年';
+$lang['date_month'] = '月';
+$lang['date_months'] = '月';
+$lang['date_week'] = '星期';
+$lang['date_weeks'] = '星期';
+$lang['date_day'] = '天';
+$lang['date_days'] = '天';
+$lang['date_hour'] = '时';
+$lang['date_hours'] = '时';
+$lang['date_minute'] = '分';
+$lang['date_minutes'] = '分';
+$lang['date_second'] = '秒';
+$lang['date_seconds'] = '秒';
+
+$lang['UM12']	= '(UTC -12:00) 贝克 / 霍德兰岛';
+$lang['UM11']	= '(UTC -11:00) 纽埃';
+$lang['UM10']	= '(UTC -10:00) 夏威夷-阿留申标准时间，库克群岛、塔希提岛';
+$lang['UM95']	= '(UTC -9:30) 马克萨斯群岛';
+$lang['UM9']	= '(UTC -9:00) 阿拉斯加标准时间，甘比尔群岛';
+$lang['UM8']	= '(UTC -8:00) 太平洋标准时间，大学岛';
+$lang['UM7']	= '(UTC -7:00) 山区标准时间';
+$lang['UM6']	= '(UTC -6:00) 中央标准时间';
+$lang['UM5']	= '(UTC -5:00) 东部标准时间，加勒比海西部标准时间';
+$lang['UM45']	= '(UTC -4:30) 委内瑞拉标准时间';
+$lang['UM4']	= '(UTC -4:00) 大西洋标准时间，加勒比海东部标准时间';
+$lang['UM35']	= '(UTC -3:30) 纽芬兰标准时间';
+$lang['UM3']	= '(UTC -3:00) 阿根廷、巴西、法属圭亚那、乌拉圭';
+$lang['UM2']	= '(UTC -2:00) 南乔治亚岛和南桑威奇群岛';
+$lang['UM1']	= '(UTC -1:00) 亚速尔群岛、佛得角群岛';
+$lang['UTC']	= '(UTC) 格林威治标准时间，西欧时间';
+$lang['UP1']	= '(UTC +1:00) 欧洲中部时间，西非时间';
+$lang['UP2']	= '(UTC +2:00) 中部非洲时间，东欧时间，加里宁格勒蒂姆时间';
+$lang['UP3']	= '(UTC +3:00) 莫斯科时间，东非时间，阿拉伯标准时间';
+$lang['UP35']	= '(UTC +3:30) 伊朗标准时间';
+$lang['UP4']	= '(UTC +4:00) 阿塞拜疆标准时间，萨马拉时间';
+$lang['UP45']	= '(UTC +4:30) 阿富汗';
+$lang['UP5']	= '(UTC +5:00) 巴基斯坦标准时间，叶卡捷琳堡时间';
+$lang['UP55']	= '(UTC +5:30) 印度标准时间、斯里兰卡时间';
+$lang['UP575']	= '(UTC +5:45) 尼泊尔时间';
+$lang['UP6']	= '(UTC +6:00) 孟加拉国标准时间，不丹时间，鄂木斯克时间';
+$lang['UP65']	= '(UTC +6:30) 缅甸';
+$lang['UP7']	= '(UTC +7:00) 克拉斯诺雅茨克时间，柬埔寨、老挝、泰国、越南';
+$lang['UP8']	= '(UTC +8:00) 澳大利亚西部标准时间，北京时间，伊尔库茨克时间';
+$lang['UP875']	= '(UTC +8:45) 澳大利亚中央西部标准时间';
+$lang['UP9']	= '(UTC +9:00) 日本标准时间，韩国标准时间，雅库茨克时间';
+$lang['UP95']	= '(UTC +9:30) 澳大利亚中部标准时间';
+$lang['UP10']	= '(UTC +10:00) 澳大利亚东部标准时间，符拉迪沃斯托克时间';
+$lang['UP105']	= '(UTC +10:30) 豪勋爵岛';
+$lang['UP11']	= '(UTC +11:00) 中科雷姆斯克时间，所罗门群岛，瓦努阿图';
+$lang['UP115']	= '(UTC +11:30) 诺福克岛';
+$lang['UP12']	= '(UTC +12:00) 斐济，吉尔伯特群岛，堪察加时间，新西兰标准时间';
+$lang['UP1275']	= '(UTC +12:45) 查塔姆群岛标准时间';
+$lang['UP13']	= '(UTC +13:00) 萨摩亚时区，凤凰岛时间，汤加';
+$lang['UP14']	= '(UTC +14:00) 莱恩群岛';
diff --git a/system/language/chinese_simplified/db_lang.php b/system/language/chinese_simplified/db_lang.php
new file mode 100644
index 00000000..e8471420
--- /dev/null
+++ b/system/language/chinese_simplified/db_lang.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['db_invalid_connection_str'] = '无法根据提交的连接字符串确定数据库设置。  ';
+$lang['db_unable_to_connect'] = '无法使用提供的设置连接到数据库服务器。';
+$lang['db_unable_to_select'] = '无法选择指定的数据库： %s';
+$lang['db_unable_to_create'] = '无法创建指定的数据库：%s';
+$lang['db_invalid_query'] = '提交的查询无效。';
+$lang['db_must_set_table'] = '查询中必须设置要查询的表名。';
+$lang['db_must_use_set'] = '更新数据请使用 Set 方法。';
+$lang['db_must_use_index'] = '必须指定索引以匹配批量更新。';
+$lang['db_batch_missing_index'] = '批量更新操作中一个或多个行缺少指定的索引。';
+$lang['db_must_use_where'] = '更新操作必须包含 Where 条件。';
+$lang['db_del_must_use_where'] = '删除操作必须包含 Where 或 Like 条件。';
+$lang['db_field_param_missing'] = '获取字段需要指定表名。';
+$lang['db_unsupported_function'] = '功能不被您当前使用的数据库支持。';
+$lang['db_transaction_failure'] = '事务失败：执行回滚。';
+$lang['db_unable_to_drop'] = '无法删除指定的数据库。';
+$lang['db_unsupported_feature'] = '特性不被您当前使用的数据库支持。  ';
+$lang['db_unsupported_compression'] = '您选择的文件压缩格式不被服务器支持。  ';
+$lang['db_filepath_error'] = '提交的文件路径无法写入。  ';
+$lang['db_invalid_cache_path'] = '提交的缓存路径无效或无法写入。';
+$lang['db_table_name_required'] = '操作需要指定表名。 ';
+$lang['db_column_name_required'] = '操作需要指定列名。  ';
+$lang['db_column_definition_required'] = '操作需要指定列定义。';
+$lang['db_unable_to_set_charset'] = '无法设置字符集： %s';
+$lang['db_error_heading'] = '数据库发生错误。';
diff --git a/system/language/chinese_simplified/email_lang.php b/system/language/chinese_simplified/email_lang.php
new file mode 100644
index 00000000..a362818f
--- /dev/null
+++ b/system/language/chinese_simplified/email_lang.php
@@ -0,0 +1,30 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['email_must_be_array'] = 'E-mail 效验方法必须传入一个 Array';
+$lang['email_invalid_address'] = '无效的 E-mail 地址： %s';
+$lang['email_attachment_missing'] = '无法找到以下的 E-mail 附件： %s';
+$lang['email_attachment_unreadable'] = '无法读取以下的 E-mail 附件： %s';
+$lang['email_no_from'] = '无法发送没有 "From" 头的 E-mail';
+$lang['email_no_recipients'] = 'E-mail 必须包含收件人（To, Cc, or Bcc）';
+$lang['email_send_failure_phpmail'] = '无法使用 PHP 的 mail() 函数。  您的服务器设置禁止使用此函数发送 E-mail。';
+$lang['email_send_failure_sendmail'] = '无法使用 PHP sendmail。您的服务器设置禁止使用此方法发送 E-mail。';
+$lang['email_send_failure_smtp'] = '无法使用 PHP SMTP。您的服务器设置禁止使用此方法发送 E-mail。';
+$lang['email_sent'] = 'E-mail 成功发送： %s';
+$lang['email_no_socket'] = '无法打开 Socket 发送 E-mail，检查设置。';
+$lang['email_no_hostname'] = '没有指定 SMTP 服务器的主机名';
+$lang['email_smtp_error'] = '发生错误，SMTP 错误信息为： %s';
+$lang['email_no_smtp_unpw'] = '错误：必须指定 SMTP 的用户名及密码。';
+$lang['email_failed_smtp_login'] = '发送时 AUTH 命令失败，错误：%s';
+$lang['email_smtp_auth_un'] = '用户名认证失败，错误：%s';
+$lang['email_smtp_auth_pw'] = '密码认证失败，错误：%s';
+$lang['email_smtp_data_failure'] = '无法发送数据：%s';
+$lang['email_exit_status'] = '退出状态码：%s';
diff --git a/system/language/chinese_simplified/form_validation_lang.php b/system/language/chinese_simplified/form_validation_lang.php
new file mode 100644
index 00000000..1ace165e
--- /dev/null
+++ b/system/language/chinese_simplified/form_validation_lang.php
@@ -0,0 +1,40 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['form_validation_required'] = '要求含有 {field} 字段。';
+$lang['form_validation_isset'] = '{field} 字段必须有值。';
+$lang['form_validation_valid_email'] = '{field} 字段必须是一个有效的 E-mail 地址。';
+$lang['form_validation_valid_emails'] = '{field} 字段包含的 E-mail 地址必须全部有效。';
+$lang['form_validation_valid_url'] = '{field} 字段必须是一个有效的 URL。';
+$lang['form_validation_valid_ip'] = '{field} 字段必须包含一个有效的 IP 地址。';
+$lang['form_validation_min_length'] = '{field} 字段最少需要有 {param} 字的长度。';
+$lang['form_validation_max_length'] = '{field} 字段不能超过 {param} 字的长度。';
+$lang['form_validation_exact_length'] = '{field} 字段必须是 {param} 字的长度。';
+$lang['form_validation_alpha'] = '{field} 字段取值只允许为字母。';
+$lang['form_validation_alpha_numeric'] = '{field} 字段取值只允许为字母和数字。';
+$lang['form_validation_alpha_numeric_spaces'] = '{field} 字段取值只允许为字母、数字和空格。';
+$lang['form_validation_alpha_dash'] = '{field} 字段取值只允许为字母、数字、下划线和破折号';
+$lang['form_validation_numeric'] = '{field} 字段取值只允许为数字。';
+$lang['form_validation_is_numeric'] = '{field} 字段必须只包含数字。';
+$lang['form_validation_integer'] = '{field} 字段必须是整数。';
+$lang['form_validation_regex_match'] = '{field} 字段是错误的格式。';
+$lang['form_validation_matches'] = '{field} 字段与 {param} 字段不匹配。';
+$lang['form_validation_differs'] = '{field} 字段与 {param} 字段必须不同。';
+$lang['form_validation_is_unique'] = '{field} 字段必须是一个独一无二的值。';
+$lang['form_validation_is_natural'] = '{field} 字段必须是自然数。';
+$lang['form_validation_is_natural_no_zero'] = '{field} 字段必须是非 0 的自然数。';
+$lang['form_validation_decimal'] = '{field} 字段必须是十进制数。';
+$lang['form_validation_less_than'] = '{field} 字段的值必须小于 {param}。';
+$lang['form_validation_less_than_equal_to'] = '{field} 字段的值必须小于等于 {param}。';
+$lang['form_validation_greater_than'] = '{field} 字段的值必须大于 {param}。';
+$lang['form_validation_greater_than_equal_to'] = '{field} 字段的值必须大于等于 {param}。';
+$lang['form_validation_error_message_not_set'] = '无法获得 {field} 字段的错误信息。';
+$lang['form_validation_in_list'] = '{field} 字段必须是 {param} 中的一种。'; 
diff --git a/system/language/chinese_simplified/ftp_lang.php b/system/language/chinese_simplified/ftp_lang.php
new file mode 100644
index 00000000..603372bc
--- /dev/null
+++ b/system/language/chinese_simplified/ftp_lang.php
@@ -0,0 +1,23 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['ftp_no_connection'] = '无法找到一个有效的连接 ID。在执行任何文件例程时请确保已经连接成功。';
+$lang['ftp_unable_to_connect'] = '无法使用提供的主机名连接到 FTP 服务器。';
+$lang['ftp_unable_to_login'] = '无法登录到 FTP 服务器，请检查用户名及密码是否正确。';
+$lang['ftp_unable_to_mkdir'] = '无法创建指定的目录。';
+$lang['ftp_unable_to_changedir'] = '无法改变目录。';
+$lang['ftp_unable_to_chmod'] = '无法设置文件权限，检查文件路径或用户权限。';
+$lang['ftp_unable_to_upload'] = '无法上传指定的文件，检查上传路径或用户权限。';
+$lang['ftp_unable_to_download'] = '无法下载指定的文件，检查下载路径或用户权限。';
+$lang['ftp_no_source_file'] = '无法找到指定的源文件，检查文件路径或用户权限。';
+$lang['ftp_unable_to_rename'] = '无法重命名文件。';
+$lang['ftp_unable_to_delete'] = '无法删除文件。';
+$lang['ftp_unable_to_move'] = '无法移动文件，检查目的目录是否存在。';
diff --git a/system/language/chinese_simplified/imglib_lang.php b/system/language/chinese_simplified/imglib_lang.php
new file mode 100644
index 00000000..267ea77b
--- /dev/null
+++ b/system/language/chinese_simplified/imglib_lang.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['imglib_source_image_required'] = '必须在设置中指定一个源图像。';
+$lang['imglib_gd_required'] = '此特性依赖 GD 图形库。';
+$lang['imglib_gd_required_for_props'] = '你的服务器必须支持 GD 图形库以确定图像的属性。';
+$lang['imglib_unsupported_imagecreate'] = '你的服务器不支持 GD 函数，无法创建图像文件。';
+$lang['imglib_gif_not_supported'] = 'GIF 格式由于版权问题一般不提供，如果可能请使用 JPG 格式或 PNG 格式。';
+$lang['imglib_jpg_not_supported'] = 'JPG 格式不被支持。';
+$lang['imglib_png_not_supported'] = 'PNG 格式不被支持。';
+$lang['imglib_jpg_or_png_required'] = '设置中指定的图像缩放方法只能用于 JPG 格式或 PNG 格式。';
+$lang['imglib_copy_error'] = '替换文件时发生错误。你的文件目录必须是可写的。';
+$lang['imglib_rotate_unsupported'] = '服务器不支持图像旋转。';
+$lang['imglib_libpath_invalid'] = '图形库路径错误。在设置中必须指定正确的路径。';
+$lang['imglib_image_process_failed'] = '图像处理错误。 请验证服务器支持指定的处理方法，并且图形库路径正确。';
+$lang['imglib_rotation_angle_required'] = '必须指定旋转角度。';
+$lang['imglib_invalid_path'] = '图像路径错误。';
+$lang['imglib_copy_failed'] = '图像复制错误。';
+$lang['imglib_missing_font'] = '无法找到使用的字体。';
+$lang['imglib_save_failed'] = '图像无法保存，请确定图像或目录可写。';
diff --git a/system/language/chinese_simplified/index.html b/system/language/chinese_simplified/index.html
new file mode 100644
index 00000000..b702fbc3
--- /dev/null
+++ b/system/language/chinese_simplified/index.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+<head>
+	<title>403 Forbidden</title>
+</head>
+<body>
+
+<p>Directory access is forbidden.</p>
+
+</body>
+</html>
diff --git a/system/language/chinese_simplified/migration_lang.php b/system/language/chinese_simplified/migration_lang.php
new file mode 100644
index 00000000..05e6b747
--- /dev/null
+++ b/system/language/chinese_simplified/migration_lang.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['migration_none_found'] = '不需迁移。  ';
+$lang['migration_not_found'] = '无法根据版本号找到迁移方法： %s。';
+$lang['migration_sequence_gap'] = '版本迁移存在鸿沟：%s。';
+$lang['migration_multiple_version'] = '多个迁移对应同一版本号：%s。';
+$lang['migration_class_doesnt_exist'] = '无法找到迁移类 "%s"。';
+$lang['migration_missing_up_method'] = '无法找到迁移类 "%s" 中的 "up" 方法。';
+$lang['migration_missing_down_method'] = '无法找到迁移类 "%s" 中的 " 方法。';
+$lang['migration_invalid_filename'] = '无效的迁移文件名："%s"。';
diff --git a/system/language/chinese_simplified/number_lang.php b/system/language/chinese_simplified/number_lang.php
new file mode 100644
index 00000000..bb9433f8
--- /dev/null
+++ b/system/language/chinese_simplified/number_lang.php
@@ -0,0 +1,16 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['terabyte_abbr'] = 'TB';
+$lang['gigabyte_abbr'] = 'GB';
+$lang['megabyte_abbr'] = 'MB';
+$lang['kilobyte_abbr'] = 'KB';
+$lang['bytes'] = 'Bytes';
diff --git a/system/language/chinese_simplified/pagination_lang.php b/system/language/chinese_simplified/pagination_lang.php
new file mode 100644
index 00000000..c15c51f1
--- /dev/null
+++ b/system/language/chinese_simplified/pagination_lang.php
@@ -0,0 +1,15 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['pagination_first_link'] = '&lsaquo; 第一页';
+$lang['pagination_next_link'] = '&gt;';
+$lang['pagination_prev_link'] = '&lt;';
+$lang['pagination_last_link'] = '最后一页 &rsaquo;';
diff --git a/system/language/chinese_simplified/profiler_lang.php b/system/language/chinese_simplified/profiler_lang.php
new file mode 100644
index 00000000..171a21a4
--- /dev/null
+++ b/system/language/chinese_simplified/profiler_lang.php
@@ -0,0 +1,32 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['profiler_database'] = '数据库';
+$lang['profiler_controller_info'] = '类 / 方法';
+$lang['profiler_benchmarks'] = '基准';
+$lang['profiler_queries'] = '查询';
+$lang['profiler_get_data'] = 'GET 数据';
+$lang['profiler_post_data'] = 'POST 数据';
+$lang['profiler_uri_string'] = 'URI 字符串';
+$lang['profiler_memory_usage'] = '内存使用';
+$lang['profiler_config'] = '设置值';
+$lang['profiler_session_data'] = 'SESSION 数据';
+$lang['profiler_headers'] = 'HTTP 头';
+$lang['profiler_no_db'] = '当前没有已经载入的数据库驱动。  ';
+$lang['profiler_no_queries'] = '运行，无查询。  ';
+$lang['profiler_no_post'] = 'POST 数据不存在。';
+$lang['profiler_no_get'] = 'GET 数据不存在。';
+$lang['profiler_no_uri'] = 'URI 数据不存在。';
+$lang['profiler_no_memory'] = '无法获得内存使用数据。';
+$lang['profiler_no_profiles'] = '没有 Profile 数据 - 全部的 Profiler 都已被关闭。';
+$lang['profiler_section_hide'] = '隐藏';
+$lang['profiler_section_show'] = '显示';
+$lang['profiler_seconds'] = '秒';
diff --git a/system/language/chinese_simplified/unit_test_lang.php b/system/language/chinese_simplified/unit_test_lang.php
new file mode 100644
index 00000000..f87dacd4
--- /dev/null
+++ b/system/language/chinese_simplified/unit_test_lang.php
@@ -0,0 +1,30 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['ut_test_name'] = '测试名';
+$lang['ut_test_datatype'] = '测试的数据类型';
+$lang['ut_res_datatype'] = '期望的数据类型';
+$lang['ut_result'] = '结果';
+$lang['ut_undefined'] = '未定义的测试名';
+$lang['ut_file'] = '文件名';
+$lang['ut_line'] = '行号';
+$lang['ut_passed'] = '通过';
+$lang['ut_failed'] = '失败';
+$lang['ut_boolean'] = 'Boolean';
+$lang['ut_integer'] = 'Integer';
+$lang['ut_float'] = 'Float';
+$lang['ut_double'] = 'Float'; // can be the same as float
+$lang['ut_string'] = 'String';
+$lang['ut_array'] = 'Array';
+$lang['ut_object'] = 'Object';
+$lang['ut_resource'] = 'Resource';
+$lang['ut_null'] = 'Null';
+$lang['ut_notes'] = '笔记';
diff --git a/system/language/chinese_simplified/upload_lang.php b/system/language/chinese_simplified/upload_lang.php
new file mode 100644
index 00000000..573b04e1
--- /dev/null
+++ b/system/language/chinese_simplified/upload_lang.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ * System messages translation for CodeIgniter(tm)
+ *
+ * @author	CodeIgniter community
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	http://codeigniter.com
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$lang['upload_userfile_not_set'] = '无法找到用户文件。  ';
+$lang['upload_file_exceeds_limit'] = '上传文件的大小超过 PHP 设置中指定的最大大小。';
+$lang['upload_file_exceeds_form_limit'] = '上传文件的大小超过表单中指定的最大大小。';
+$lang['upload_file_partial'] = '文件仅上传了一部分。  .';
+$lang['upload_no_temp_directory'] = '无法找到临时文件夹。  .';
+$lang['upload_unable_to_write_file'] = '无法写入文件。 Yeesssssss.';
+$lang['upload_stopped_by_extension'] = '文件上传被扩展停止。  ';
+$lang['upload_no_file_selected'] = '没有选择要上传的文件。  ';
+$lang['upload_invalid_filetype'] = '禁止上传的文件类型.  ';
+$lang['upload_invalid_filesize'] = '文件大小超过限制。';
+$lang['upload_invalid_dimensions'] = '不允许的图像尺寸。';
+$lang['upload_destination_error'] = '移动上传的文件至最终保存路径时发生错误。  ';
+$lang['upload_no_filepath'] = '上传路径无效。';
+$lang['upload_no_file_types'] = '指定允许的文件类型。';
+$lang['upload_bad_filename'] = '提交的文件名已经存在。';
+$lang['upload_not_writable'] = '上传的目的路径不可写。';