diff --git a/module/testtask/lang/de.php b/module/testtask/lang/de.php
index fd5626b44c..9f25dddd63 100644
--- a/module/testtask/lang/de.php
+++ b/module/testtask/lang/de.php
@@ -173,14 +173,6 @@ $lang->testtask->report->charts['testTaskPerRunResult'] = 'Ergebnisbericht';
 $lang->testtask->report->charts['testTaskPerType']      = 'Berichttyp';
 $lang->testtask->report->charts['testTaskPerModule']    = 'Modulbericht';
 $lang->testtask->report->charts['testTaskPerRunner']    = 'Ausgeführt von Bericht';
-$lang->testtask->report->charts['bugSeverityGroups']    = 'Dringlichkeitsbericht';
-$lang->testtask->report->charts['bugStatusGroups']      = 'Status Bericht';
-$lang->testtask->report->charts['bugOpenedByGroups']    = 'Bugersteller Bericht';
-$lang->testtask->report->charts['bugResolvedByGroups']  = 'Gelöst von Bericht';
-$lang->testtask->report->charts['bugResolutionGroups']  = 'Lösungsbersicht';
-$lang->testtask->report->charts['bugModuleGroups']      = 'Bug Modul Bericht';
-$lang->testtask->report->charts['bugStageGroups']       = 'Bug Priority Distribution';
-$lang->testtask->report->charts['bugHandleGroups']      = 'Distribution of daily bug processing';
 
 $lang->testtask->report->options = new stdclass();
 $lang->testtask->report->options->graph  = new stdclass();
diff --git a/module/testtask/lang/en.php b/module/testtask/lang/en.php
index 168524edc0..4587d5c3c8 100644
--- a/module/testtask/lang/en.php
+++ b/module/testtask/lang/en.php
@@ -183,14 +183,6 @@ $lang->testtask->report->charts['testTaskPerRunResult'] = 'Test Case Result';
 $lang->testtask->report->charts['testTaskPerType']      = 'Test Case Type';
 $lang->testtask->report->charts['testTaskPerModule']    = 'Test Case Module';
 $lang->testtask->report->charts['testTaskPerRunner']    = 'Test Case RunBy';
-$lang->testtask->report->charts['bugSeverityGroups']    = 'Bug Severity Distribution';
-$lang->testtask->report->charts['bugStatusGroups']      = 'Bug Status Distribution';
-$lang->testtask->report->charts['bugOpenedByGroups']    = 'Bug ReportedBy Distribution';
-$lang->testtask->report->charts['bugResolvedByGroups']  = 'Bug ResolvedBy Distribution';
-$lang->testtask->report->charts['bugResolutionGroups']  = 'Bug Resolution Distribution';
-$lang->testtask->report->charts['bugModuleGroups']      = 'Bug Module Distribution';
-$lang->testtask->report->charts['bugStageGroups']       = 'Bug Priority Distribution';
-$lang->testtask->report->charts['bugHandleGroups']      = 'Distribution of daily bug processing';
 
 $lang->testtask->report->options = new stdclass();
 $lang->testtask->report->options->graph  = new stdclass();
diff --git a/module/testtask/lang/fr.php b/module/testtask/lang/fr.php
index 819223e35a..e3953766cf 100644
--- a/module/testtask/lang/fr.php
+++ b/module/testtask/lang/fr.php
@@ -173,14 +173,6 @@ $lang->testtask->report->charts['testTaskPerRunResult'] = 'Résultat des CasTest
 $lang->testtask->report->charts['testTaskPerType']      = 'Type de CasTests';
 $lang->testtask->report->charts['testTaskPerModule']    = 'Module CasTests';
 $lang->testtask->report->charts['testTaskPerRunner']    = 'CasTests joués par';
-$lang->testtask->report->charts['bugSeverityGroups']    = 'Distribution Bug Sévérité';
-$lang->testtask->report->charts['bugStatusGroups']      = 'Distribution Bug Statuts';
-$lang->testtask->report->charts['bugOpenedByGroups']    = 'Distribution signalement de Bug';
-$lang->testtask->report->charts['bugResolvedByGroups']  = 'Distribution Résolus par';
-$lang->testtask->report->charts['bugResolutionGroups']  = 'Distribution Résolution';
-$lang->testtask->report->charts['bugModuleGroups']      = 'Distribution Bug Module';
-$lang->testtask->report->charts['bugStageGroups']       = 'Bug Priority Distribution';
-$lang->testtask->report->charts['bugHandleGroups']      = 'Distribution of daily bug processing';
 
 $lang->testtask->report->options = new stdclass();
 $lang->testtask->report->options->graph  = new stdclass();
diff --git a/module/testtask/lang/vi.php b/module/testtask/lang/vi.php
index 3c07c1e93f..3f0cf1f8de 100644
--- a/module/testtask/lang/vi.php
+++ b/module/testtask/lang/vi.php
@@ -173,14 +173,6 @@ $lang->testtask->report->charts['testTaskPerRunResult'] = 'Test Kết quả tìn
 $lang->testtask->report->charts['testTaskPerType']      = 'Test Loại tình huống';
 $lang->testtask->report->charts['testTaskPerModule']    = 'Test Case Module';
 $lang->testtask->report->charts['testTaskPerRunner']    = 'Test Case RunBy';
-$lang->testtask->report->charts['bugSeverityGroups']    = 'Phân chia mức độ Bug';
-$lang->testtask->report->charts['bugStatusGroups']      = 'Phân chia tình trạng Bug';
-$lang->testtask->report->charts['bugOpenedByGroups']    = 'Phân chia người báo cáo Bug';
-$lang->testtask->report->charts['bugResolvedByGroups']  = 'Phân chia người giải quyết Bug';
-$lang->testtask->report->charts['bugResolutionGroups']  = 'Phân chia giải pháp Bug';
-$lang->testtask->report->charts['bugModuleGroups']      = 'Phân chia Module Bug';
-$lang->testtask->report->charts['bugStageGroups']       = 'Bug Priority Distribution';
-$lang->testtask->report->charts['bugHandleGroups']      = 'Distribution of daily bug processing';
 
 $lang->testtask->report->options = new stdclass();
 $lang->testtask->report->options->graph  = new stdclass();
diff --git a/module/testtask/lang/zh-tw.php b/module/testtask/lang/zh-tw.php
index f5c1577827..c96e2df1be 100644
--- a/module/testtask/lang/zh-tw.php
+++ b/module/testtask/lang/zh-tw.php
@@ -183,14 +183,6 @@ $lang->testtask->report->charts['testTaskPerRunResult'] = '按用例結果統計
 $lang->testtask->report->charts['testTaskPerType']      = '按用例類型統計';
 $lang->testtask->report->charts['testTaskPerModule']    = '按用例模組統計';
 $lang->testtask->report->charts['testTaskPerRunner']    = '按用例執行人統計';
-$lang->testtask->report->charts['bugSeverityGroups']    = 'Bug嚴重級別分佈';
-$lang->testtask->report->charts['bugStatusGroups']      = 'Bug狀態分佈';
-$lang->testtask->report->charts['bugOpenedByGroups']    = 'Bug創建者分佈';
-$lang->testtask->report->charts['bugResolvedByGroups']  = 'Bug解決者分佈';
-$lang->testtask->report->charts['bugResolutionGroups']  = 'Bug解決方案分佈';
-$lang->testtask->report->charts['bugModuleGroups']      = 'Bug模組分佈';
-$lang->testtask->report->charts['bugStageGroups']       = 'Bug重要程度階段分佈';
-$lang->testtask->report->charts['bugHandleGroups']      = 'Bug每日處理情況分佈';
 
 $lang->testtask->report->options = new stdclass();
 $lang->testtask->report->options->graph  = new stdclass();