diff --git a/module/custom/control.php b/module/custom/control.php
index 648c51b678..416bcd8da1 100644
--- a/module/custom/control.php
+++ b/module/custom/control.php
@@ -52,8 +52,8 @@ class custom extends control
         {
             $this->app->loadConfig($module);
             $unitList = zget($this->config->$module, 'unitList', '');
-            $this->view->unitList     = explode(',', $unitList);
-            $this->view->mainCurrency = zget($this->config->$module, 'mainCurrency', 'CNY');
+            $this->view->unitList        = explode(',', $unitList);
+            $this->view->defaultCurrency = zget($this->config->$module, 'defaultCurrency', 'CNY');
         }
         if(($module == 'story' or $module == 'testcase') and $field == 'review')
         {
@@ -94,7 +94,7 @@ class custom extends control
             {
                 $data = fixer::input('post')->join('unitList', ',')->get();
                 if(empty($data->unitList)) $this->send(array('result' => 'fail', 'message' => $this->lang->custom->currencyNotEmpty));
-                if(empty($data->mainCurrency)) $this->send(array('result' => 'fail', 'message' => $this->lang->custom->mainCurrencyNotEmpty));
+                if(empty($data->defaultCurrency)) $this->send(array('result' => 'fail', 'message' => $this->lang->custom->defaultNotEmpty));
                 $this->loadModel('setting')->setItems("system.$module", $data);
             }
             elseif($module == 'story' and $field == 'review')
diff --git a/module/custom/js/set.js b/module/custom/js/set.js
index 29772b3968..0236338696 100644
--- a/module/custom/js/set.js
+++ b/module/custom/js/set.js
@@ -16,8 +16,8 @@ $(function()
 
 $('[name*=unitList]').change(function()
 {
-    var mainCurrency = $('#mainCurrency').val();
-    $('#mainCurrency').empty().append('<option></option>');
+    var defaultCurrency = $('#defaultCurrency').val();
+    $('#defaultCurrency').empty().append('<option></option>');
     $('[name*=unitList]').each(function()
     {
         if($(this).prop('checked'))
@@ -26,12 +26,12 @@ $('[name*=unitList]').change(function()
             var firstStr = $(this).val() + '">';
 
             text = text.substring(text.lastIndexOf(firstStr) + firstStr.length, text.lastIndexOf('<'));
-            $('#mainCurrency').append("<option value='" + $(this).val() + "'>" + text + '</option>');
+            $('#defaultCurrency').append("<option value='" + $(this).val() + "'>" + text + '</option>');
                                                                                 }
     });
 
-     $('#mainCurrency').val(mainCurrency);
-     $("#mainCurrency").trigger("chosen:updated");
+     $('#defaultCurrency').val(defaultCurrency);
+     $("#defaultCurrency").trigger("chosen:updated");
 });
 
 $('[name*=unitList]').change();
diff --git a/module/custom/lang/de.php b/module/custom/lang/de.php
index b7a7949acc..447b9286e5 100644
--- a/module/custom/lang/de.php
+++ b/module/custom/lang/de.php
@@ -67,10 +67,10 @@ $lang->custom->tipCostList['CV']  = 'Cost Variance(CV%)';
 $lang->custom->tipRangeList[0]  = 'No';
 $lang->custom->tipRangeList[1]  = 'Yes';
 
-$lang->custom->regionMustNumber     = 'The interval must be a number!';
-$lang->custom->tipNotEmpty          = 'The prompt can not be empty!';
-$lang->custom->currencyNotEmpty     = 'You have to select one currency at least.';
-$lang->custom->mainCurrencyNotEmpty = 'The main currency can not bu empty';
+$lang->custom->regionMustNumber = 'The interval must be a number!';
+$lang->custom->tipNotEmpty      = 'The prompt can not be empty!';
+$lang->custom->currencyNotEmpty = 'You have to select one currency at least.';
+$lang->custom->defaultNotEmpty  = 'The default currency can not be empty';
 
 $lang->custom->numberError = 'The interval must be greater than zero!';
 
@@ -91,7 +91,7 @@ $lang->custom->object['block']    = 'ClosedBlock';
 
 $lang->custom->program = new stdClass();
 $lang->custom->program->currencySetting    = 'Currency Setting';
-$lang->custom->program->mainCurrency       = 'Main Currency';
+$lang->custom->program->defaultCurrency    = 'Default Currency';
 $lang->custom->program->fields['unitList'] = 'Unit List';
 
 $lang->custom->story = new stdClass();
diff --git a/module/custom/lang/en.php b/module/custom/lang/en.php
index 542e596ff9..6e99070d28 100644
--- a/module/custom/lang/en.php
+++ b/module/custom/lang/en.php
@@ -67,10 +67,10 @@ $lang->custom->tipCostList['CV']  = 'Cost Variance(CV%)';
 $lang->custom->tipRangeList[0]  = 'No';
 $lang->custom->tipRangeList[1]  = 'Yes';
 
-$lang->custom->regionMustNumber     = 'The interval must be a number!';
-$lang->custom->tipNotEmpty          = 'The prompt can not be empty!';
-$lang->custom->currencyNotEmpty     = 'You have to select one currency at least.';
-$lang->custom->mainCurrencyNotEmpty = 'The main currency can not bu empty';
+$lang->custom->regionMustNumber = 'The interval must be a number!';
+$lang->custom->tipNotEmpty      = 'The prompt can not be empty!';
+$lang->custom->currencyNotEmpty = 'You have to select one currency at least.';
+$lang->custom->defaultNotEmpty  = 'The default currency can not be empty';
 
 $lang->custom->numberError = 'The interval must be greater than zero!';
 
@@ -91,7 +91,7 @@ $lang->custom->object['block']    = 'Block';
 
 $lang->custom->program = new stdClass();
 $lang->custom->program->currencySetting    = 'Currency Setting';
-$lang->custom->program->mainCurrency       = 'Main Currency';
+$lang->custom->program->defaultCurrency    = 'Default Currency';
 $lang->custom->program->fields['unitList'] = 'Unit List';
 
 $lang->custom->story = new stdClass();
diff --git a/module/custom/lang/fr.php b/module/custom/lang/fr.php
index 73b739055e..1481547532 100644
--- a/module/custom/lang/fr.php
+++ b/module/custom/lang/fr.php
@@ -67,10 +67,10 @@ $lang->custom->tipCostList['CV']  = 'Cost Variance(CV%)';
 $lang->custom->tipRangeList[0]  = 'No';
 $lang->custom->tipRangeList[1]  = 'Yes';
 
-$lang->custom->regionMustNumber     = 'The interval must be a number!';
-$lang->custom->tipNotEmpty          = 'The prompt can not be empty!';
-$lang->custom->currencyNotEmpty     = 'You have to select one currency at least.';
-$lang->custom->mainCurrencyNotEmpty = 'The main currency can not bu empty';
+$lang->custom->regionMustNumber = 'The interval must be a number!';
+$lang->custom->tipNotEmpty      = 'The prompt can not be empty!';
+$lang->custom->currencyNotEmpty = 'You have to select one currency at least.';
+$lang->custom->defaultNotEmpty  = 'The default currency can not be empty';
 
 $lang->custom->numberError = 'The interval must be greater than zero!';
 
@@ -91,7 +91,7 @@ $lang->custom->object['block']    = 'Bloc';
 
 $lang->custom->program = new stdClass();
 $lang->custom->program->currencySetting    = 'Currency Setting';
-$lang->custom->program->mainCurrency       = 'Main Currency';
+$lang->custom->program->defaultCurrency    = 'Default Currency';
 $lang->custom->program->fields['unitList'] = 'Unit List';
 
 $lang->custom->story = new stdClass();
diff --git a/module/custom/lang/vi.php b/module/custom/lang/vi.php
index 9cc8118dd1..02b6334734 100644
--- a/module/custom/lang/vi.php
+++ b/module/custom/lang/vi.php
@@ -67,10 +67,10 @@ $lang->custom->tipCostList['CV']  = 'Cost Variance(CV%)';
 $lang->custom->tipRangeList[0]  = 'No';
 $lang->custom->tipRangeList[1]  = 'Yes';
 
-$lang->custom->regionMustNumber     = 'The interval must be a number!';
-$lang->custom->tipNotEmpty          = 'The prompt can not be empty!';
-$lang->custom->currencyNotEmpty     = 'You have to select one currency at least.';
-$lang->custom->mainCurrencyNotEmpty = 'The main currency can not bu empty';
+$lang->custom->regionMustNumber = 'The interval must be a number!';
+$lang->custom->tipNotEmpty      = 'The prompt can not be empty!';
+$lang->custom->currencyNotEmpty = 'You have to select one currency at least.';
+$lang->custom->defaultNotEmpty  = 'The default currency can not bu empty';
 
 $lang->custom->numberError = 'The interval must be greater than zero!';
 
@@ -91,7 +91,7 @@ $lang->custom->object['block']    = 'Block';
 
 $lang->custom->program = new stdClass();
 $lang->custom->program->currencySetting    = 'Currency Setting';
-$lang->custom->program->mainCurrency       = 'Main Currency';
+$lang->custom->program->defaultCurrency    = 'Default Currency';
 $lang->custom->program->fields['unitList'] = 'Unit List';
 
 $lang->custom->story = new stdClass();
diff --git a/module/custom/lang/zh-cn.php b/module/custom/lang/zh-cn.php
index ab0c265664..e7dba526ef 100644
--- a/module/custom/lang/zh-cn.php
+++ b/module/custom/lang/zh-cn.php
@@ -67,10 +67,10 @@ $lang->custom->tipCostList['CV']  = '成本偏差率(CV%)';
 $lang->custom->tipRangeList[0]  = '否';
 $lang->custom->tipRangeList[1]  = '是';
 
-$lang->custom->regionMustNumber     = '区间必须是数字';
-$lang->custom->tipNotEmpty          = '提示语不能为空';
-$lang->custom->currencyNotEmpty     = '至少选择一种货币';
-$lang->custom->mainCurrencyNotEmpty = '主要货币不能为空';
+$lang->custom->regionMustNumber = '区间必须是数字';
+$lang->custom->tipNotEmpty      = '提示语不能为空';
+$lang->custom->currencyNotEmpty = '至少选择一种货币';
+$lang->custom->defaultNotEmpty  = '默认货币不能为空';
 
 $lang->custom->numberError = '区间必须大于零';
 
@@ -91,7 +91,7 @@ $lang->custom->object['block']    = '区块';
 
 $lang->custom->program = new stdClass();
 $lang->custom->program->currencySetting    = '货币设置';
-$lang->custom->program->mainCurrency       = '主要货币';
+$lang->custom->program->defaultCurrency    = '默认货币';
 $lang->custom->program->fields['unitList'] = '预算单位';
 
 $lang->custom->story = new stdClass();
diff --git a/module/custom/lang/zh-tw.php b/module/custom/lang/zh-tw.php
index 2f7d281ffd..329768c5a6 100644
--- a/module/custom/lang/zh-tw.php
+++ b/module/custom/lang/zh-tw.php
@@ -45,7 +45,7 @@ $lang->custom->configureScrum     = "敏捷自定義";
 
 $lang->custom->object['program'] = '項目';
 $lang->custom->program->currencySetting    = '貨幣設置';
-$lang->custom->program->mainCurrency       = '主要貨幣';
+$lang->custom->program->defaultCurrency    = '默認貨幣';
 $lang->custom->program->fields['unitList'] = '預算單位';
 
 $lang->custom->unitList['efficiency'] = '工時/';
@@ -64,10 +64,10 @@ $lang->custom->tipCostList['CV']  = '成本偏差率(CV%)';
 $lang->custom->tipRangeList[0]  = '否';
 $lang->custom->tipRangeList[1]  = '是';
 
-$lang->custom->regionMustNumber     = '區間必須是數字';
-$lang->custom->tipNotEmpty          = '提示語不能為空';
-$lang->custom->currencyNotEmpty     = '至少選擇一種貨幣';
-$lang->custom->mainCurrencyNotEmpty = '主要貨幣不能為空';
+$lang->custom->regionMustNumber = '區間必須是數字';
+$lang->custom->tipNotEmpty      = '提示語不能為空';
+$lang->custom->currencyNotEmpty = '至少選擇一種貨幣';
+$lang->custom->defaultNotEmpty  = '默認貨幣不能為空';
 
 $lang->custom->numberError = '區間必須大於零';
 
diff --git a/module/custom/view/set.html.php b/module/custom/view/set.html.php
index 5b439cdf05..d5c135dbb6 100644
--- a/module/custom/view/set.html.php
+++ b/module/custom/view/set.html.php
@@ -63,8 +63,8 @@ EOT;
           <td colspan='5'><?php echo html::checkbox('unitList', $lang->program->unitList, $unitList);?></td>
         </tr>
         <tr>
-          <th class='text-left'><?php echo $lang->custom->program->mainCurrency;?></th>
-          <td><?php echo html::select('mainCurrency', $lang->program->unitList, $mainCurrency, "class='form-control chosen' required");?></td>
+          <th class='text-left'><?php echo $lang->custom->program->defaultCurrency;?></th>
+          <td><?php echo html::select('defaultCurrency', $lang->program->unitList, $defaultCurrency, "class='form-control chosen' required");?></td>
         </tr>
         <tr>
           <td colspan='4' class='text-center'><?php echo html::submitButton();?></td>
diff --git a/module/program/view/pgmcreate.html.php b/module/program/view/pgmcreate.html.php
index 99f79d9c92..36adf35b00 100644
--- a/module/program/view/pgmcreate.html.php
+++ b/module/program/view/pgmcreate.html.php
@@ -72,7 +72,7 @@
               <span class='input-group-addon fix-border'><?php echo zget($budgetUnitList, $parentProgram->budgetUnit);?></span>
               <?php else:?>
               <span class='input-group-addon fix-border'></span>
-              <?php echo html::select('budgetUnit', $budgetUnitList, $config->program->mainCurrency, "class='form-control'");?>
+              <?php echo html::select('budgetUnit', $budgetUnitList, $config->program->defaultCurrency, "class='form-control'");?>
               <?php endif;?>
             </div>
           </td>
diff --git a/module/program/view/prjcreate.html.php b/module/program/view/prjcreate.html.php
index 2c7e4f83a8..06192e1fb0 100644
--- a/module/program/view/prjcreate.html.php
+++ b/module/program/view/prjcreate.html.php
@@ -57,7 +57,7 @@
               <span class='input-group-addon'><?php echo zget($budgetUnitList, $parentProgram->budgetUnit);?></span>
               <?php else:?>
               <span class='input-group-addon'></span>
-              <?php echo html::select('budgetUnit', $budgetUnitList, $config->program->mainCurrency, "class='form-control'");?>
+              <?php echo html::select('budgetUnit', $budgetUnitList, $config->program->defaultCurrency, "class='form-control'");?>
               <?php endif;?>
             </div>
           </td>