diff --git a/module/project/lang/de.php b/module/project/lang/de.php
index 693b24c59f..5e9972181c 100644
--- a/module/project/lang/de.php
+++ b/module/project/lang/de.php
@@ -505,3 +505,9 @@ $lang->project->featureBar['managemembers']['all'] = 'Manage Team';
 $lang->project->api = new stdclass();
 $lang->project->api->error = new stdclass();
 $lang->project->api->error->productNotFound = 'Product not found';
+
+$lang->project->disabledHint = new stdclass();
+$lang->project->disabledHint->linkedStory             = "{$lang->projectCommon} has {$lang->SRCommon} linked in {$lang->productCommon} and cannot be unlinked. Please unlink {$lang->SRCommon} first.";
+$lang->project->disabledHint->createdStage            = "{$lang->productCommon} contains created stages. To unlink it from {$lang->projectCommon}, please remove the created stages first.";
+$lang->project->disabledHint->linkedStoryAndStage     = "{$lang->productCommon} contains created stages and linked {$lang->SRCommon}. To disconnect it from {$lang->projectCommon}, please unlink {$lang->SRCommon} first and then delete the created stages.";
+$lang->project->disabledHint->linkedStoryAndExecution = "{$lang->SRCommon} in{$lang->productCommon} is currently linked to {$lang->projectCommon} and {$lang->execution->common}. Please unlink {$lang->SRCommon} from {$lang->projectCommon} and {$lang->execution->common} first.";
diff --git a/module/project/lang/en.php b/module/project/lang/en.php
index 693b24c59f..5e9972181c 100644
--- a/module/project/lang/en.php
+++ b/module/project/lang/en.php
@@ -505,3 +505,9 @@ $lang->project->featureBar['managemembers']['all'] = 'Manage Team';
 $lang->project->api = new stdclass();
 $lang->project->api->error = new stdclass();
 $lang->project->api->error->productNotFound = 'Product not found';
+
+$lang->project->disabledHint = new stdclass();
+$lang->project->disabledHint->linkedStory             = "{$lang->projectCommon} has {$lang->SRCommon} linked in {$lang->productCommon} and cannot be unlinked. Please unlink {$lang->SRCommon} first.";
+$lang->project->disabledHint->createdStage            = "{$lang->productCommon} contains created stages. To unlink it from {$lang->projectCommon}, please remove the created stages first.";
+$lang->project->disabledHint->linkedStoryAndStage     = "{$lang->productCommon} contains created stages and linked {$lang->SRCommon}. To disconnect it from {$lang->projectCommon}, please unlink {$lang->SRCommon} first and then delete the created stages.";
+$lang->project->disabledHint->linkedStoryAndExecution = "{$lang->SRCommon} in{$lang->productCommon} is currently linked to {$lang->projectCommon} and {$lang->execution->common}. Please unlink {$lang->SRCommon} from {$lang->projectCommon} and {$lang->execution->common} first.";
diff --git a/module/project/lang/fr.php b/module/project/lang/fr.php
index 693b24c59f..5e9972181c 100644
--- a/module/project/lang/fr.php
+++ b/module/project/lang/fr.php
@@ -505,3 +505,9 @@ $lang->project->featureBar['managemembers']['all'] = 'Manage Team';
 $lang->project->api = new stdclass();
 $lang->project->api->error = new stdclass();
 $lang->project->api->error->productNotFound = 'Product not found';
+
+$lang->project->disabledHint = new stdclass();
+$lang->project->disabledHint->linkedStory             = "{$lang->projectCommon} has {$lang->SRCommon} linked in {$lang->productCommon} and cannot be unlinked. Please unlink {$lang->SRCommon} first.";
+$lang->project->disabledHint->createdStage            = "{$lang->productCommon} contains created stages. To unlink it from {$lang->projectCommon}, please remove the created stages first.";
+$lang->project->disabledHint->linkedStoryAndStage     = "{$lang->productCommon} contains created stages and linked {$lang->SRCommon}. To disconnect it from {$lang->projectCommon}, please unlink {$lang->SRCommon} first and then delete the created stages.";
+$lang->project->disabledHint->linkedStoryAndExecution = "{$lang->SRCommon} in{$lang->productCommon} is currently linked to {$lang->projectCommon} and {$lang->execution->common}. Please unlink {$lang->SRCommon} from {$lang->projectCommon} and {$lang->execution->common} first.";
diff --git a/module/project/lang/zh-cn.php b/module/project/lang/zh-cn.php
index 4d16515cb2..5fd9cf6cf7 100644
--- a/module/project/lang/zh-cn.php
+++ b/module/project/lang/zh-cn.php
@@ -505,3 +505,9 @@ $lang->project->featureBar['managemembers']['all'] = '团队管理';
 $lang->project->api = new stdclass();
 $lang->project->api->error = new stdclass();
 $lang->project->api->error->productNotFound = '产品不存在';
+
+$lang->project->disabledHint = new stdclass();
+$lang->project->disabledHint->linkedStory             = "{$lang->projectCommon}已经关联了该{$lang->productCommon}中的{$lang->SRCommon}，不能取消关联，您可以取消关联{$lang->SRCommon}后再操作。";
+$lang->project->disabledHint->createdStage            = "该{$lang->productCommon}已经创建了阶段，如需解除与{$lang->projectCommon}的关联，请删除已创建的阶段后再操作。";
+$lang->project->disabledHint->linkedStoryAndStage     = "该{$lang->productCommon}已经创建了阶段并关联了{$lang->SRCommon}，如需解除与{$lang->projectCommon}的关联，请先解除{$lang->SRCommon}的关联关系，然后删除已创建的阶段后再操作。";
+$lang->project->disabledHint->linkedStoryAndExecution = "该{$lang->productCommon}的{$lang->SRCommon}已经关联到了{$lang->projectCommon}和{$lang->execution->common}中，请先解除{$lang->SRCommon}与{$lang->projectCommon}和{$lang->execution->common}的关联后再操作。";