Index: modules/custom/install.php
===================================================================
--- modules/custom/install.php
+++ modules/custom/install.php
@@ -33,6 +33,6 @@
 
 $toolkit->RunSQL('/' . $module_folder . '/install/install_schema.sql');
 $toolkit->RunSQL('/' . $module_folder . '/install/install_data.sql');
-$toolkit->ImportLanguage('/' . $module_folder . '/install/english');
+$toolkit->ImportLanguage('/' . $module_folder . '/install/english', isset($constants_file));
 
-$toolkit->finalizeModuleInstall($module_folder, false);
\ No newline at end of file
+$toolkit->finalizeModuleInstall($module_folder, false);
Index: modules/in-bulletin/install.php
===================================================================
--- modules/in-bulletin/install.php
+++ modules/in-bulletin/install.php
@@ -47,7 +47,7 @@
 
 $toolkit->RunSQL('/' . $module_folder . '/install/install_schema.sql');
 $toolkit->RunSQL('/' . $module_folder . '/install/install_data.sql', '{TopicCatId}', $category->GetID());
-$toolkit->ImportLanguage('/' . $module_folder . '/install/english');
+$toolkit->ImportLanguage('/' . $module_folder . '/install/english', isset($constants_file));
 
 $toolkit->SetModuleRootCategory(basename($module_folder), $category->GetID());
 
Index: modules/in-commerce/install.php
===================================================================
--- modules/in-commerce/install.php
+++ modules/in-commerce/install.php
@@ -46,7 +46,7 @@
 
 $toolkit->RunSQL('/' . $module_folder . '/install/install_schema.sql');
 $toolkit->RunSQL('/' . $module_folder . '/install/install_data.sql', '{ProductCatId}', $category->GetID());
-$toolkit->ImportLanguage('/' . $module_folder . '/install/english');
+$toolkit->ImportLanguage('/' . $module_folder . '/install/english', isset($constants_file));
 
 $toolkit->SetModuleRootCategory(basename($module_folder), $category->GetID());
 
Index: modules/in-link/install.php
===================================================================
--- modules/in-link/install.php
+++ modules/in-link/install.php
@@ -47,7 +47,7 @@
 
 $toolkit->RunSQL('/' . $module_folder . '/install/install_schema.sql');
 $toolkit->RunSQL('/' . $module_folder . '/install/install_data.sql', '{LinkCatId}', $category->GetID());
-$toolkit->ImportLanguage('/' . $module_folder . '/install/english');
+$toolkit->ImportLanguage('/' . $module_folder . '/install/english', isset($constants_file));
 
 $toolkit->SetModuleRootCategory(basename($module_folder), $category->GetID());
 
Index: modules/in-news/install.php
===================================================================
--- modules/in-news/install.php
+++ modules/in-news/install.php
@@ -47,7 +47,7 @@
 
 $toolkit->RunSQL('/' . $module_folder . '/install/install_schema.sql');
 $toolkit->RunSQL('/' . $module_folder . '/install/install_data.sql', '{NewsCatId}', $category->GetID());
-$toolkit->ImportLanguage('/' . $module_folder . '/install/english');
+$toolkit->ImportLanguage('/' . $module_folder . '/install/english', isset($constants_file));
 
 $toolkit->SetModuleRootCategory(basename($module_folder), $category->GetID());