diff --git a/module/programplan/lang/en.php b/module/programplan/lang/en.php
index cfca25e3f2..b4d70db67d 100644
--- a/module/programplan/lang/en.php
+++ b/module/programplan/lang/en.php
@@ -11,7 +11,7 @@
  */
 $lang->programplan->common = 'Program Plan';
 
-$lang->programplan->browse        = 'Browse Program Plan';
+$lang->programplan->browse        = 'Program Plan';
 $lang->programplan->gantt         = 'Gantt Chart';
 $lang->programplan->list          = 'Stage List';
 $lang->programplan->create        = 'Create';
@@ -20,17 +20,17 @@ $lang->programplan->delete        = 'Delete';
 $lang->programplan->createSubPlan = 'Create Sub Plan';
 
 $lang->programplan->parent            = 'Parent Stage';
-$lang->programplan->emptyParent       = 'Not Yet';
+$lang->programplan->emptyParent       = 'N/A';
 $lang->programplan->name              = 'Name';
 $lang->programplan->percent           = 'Plan Workload';
 $lang->programplan->percentAB         = 'Plan Workload';
 $lang->programplan->planPercent       = 'Workload';
-$lang->programplan->attribute         = 'Attribute';
+$lang->programplan->attribute         = 'Stage';
 $lang->programplan->milestone         = 'Milestone';
 $lang->programplan->taskProgress      = 'Task Progress';
 $lang->programplan->task              = 'Task';
 $lang->programplan->begin             = 'Begin';
-$lang->programplan->end               = 'Finish';
+$lang->programplan->end               = 'End';
 $lang->programplan->realStarted       = 'Actual Started';
 $lang->programplan->realFinished      = 'Actual Finished';
 $lang->programplan->output            = 'Output';
@@ -42,8 +42,8 @@ $lang->programplan->duration          = 'Duration';
 $lang->programplan->version           = 'Version';
 $lang->programplan->full              = 'Full Screen';
 $lang->programplan->today             = 'Today';
-$lang->programplan->exporting         = 'Export';
-$lang->programplan->exportFail        = 'Export Fail';
+$lang->programplan->exporting         = 'Exporting';
+$lang->programplan->exportFail        = 'Export failed';
 $lang->programplan->hideCriticalPath  = 'Hide Critical Path';
 $lang->programplan->showCriticalPath  = 'Show Critical Path';
 
@@ -51,16 +51,17 @@ $lang->programplan->milestoneList[1] = 'Yes';
 $lang->programplan->milestoneList[0] = 'No';
 
 $lang->programplan->noData        = 'No Data';
-$lang->programplan->children      = 'Children';
-$lang->programplan->childrenAB    = 'Children';
-$lang->programplan->confirmDelete = 'Are you sure you want to delete the current plan?';
+$lang->programplan->children      = 'Sub Plan';
+$lang->programplan->childrenAB    = 'Child';
+$lang->programplan->confirmDelete = 'Do you want to delete the current plan?';
 
 $lang->programplan->stageCustom = new stdClass();
 $lang->programplan->stageCustom->date = 'Show Date';
 $lang->programplan->stageCustom->task = 'Show Task';
 
 $lang->programplan->error                  = new stdclass();
-$lang->programplan->error->percentNumber   = '"Workload Ration" must be number';
-$lang->programplan->error->planFinishSmall = '"Finish" must greater than "Begin"';
-$lang->programplan->error->percentOver     = 'The "Workload Ration" total cannot exceed 100%';
-$lang->programplan->error->createdTask     = 'The task has been decompose. Subphases cannot be added';
+$lang->programplan->error->percentNumber   = '"Workload %" must be digits.';
+$lang->programplan->error->planFinishSmall = 'The "End" date must be > the "Begin" date.';
+$lang->programplan->error->percentOver     = 'The sum of "Workload %" cannot exceed 100%.';
+$lang->programplan->error->onlyOneDev      = 'Only one stage plan can be set for a first-level stage plan.';
+$lang->programplan->error->createdTask     = 'The task has been decomposed. Sub phases cannot be added.';