Added default language pack (en-gb)

admin/extension/report/sale_order.php

@@ -0,0 +1,33 @@
+<?php
+// Heading
+$_['heading_title']     = 'Sales Report';
+
+// Text
+$_['text_extension']    = 'Extensions';
+$_['text_edit']         = 'Edit Sales Report';
+$_['text_success']      = 'Success: You have modified sales report!';
+$_['text_filter']       = 'Filter';
+$_['text_year']         = 'Years';
+$_['text_month']        = 'Months';
+$_['text_week']         = 'Weeks';
+$_['text_day']          = 'Days';
+$_['text_all_status']   = 'All Statuses';
+
+// Column
+$_['column_date_start'] = 'Date Start';
+$_['column_date_end']   = 'Date End';
+$_['column_orders']     = 'No. Orders';
+$_['column_products']   = 'No. Products';
+$_['column_tax']        = 'Tax';
+$_['column_total']      = 'Total';
+
+// Entry
+$_['entry_date_start']  = 'Date Start';
+$_['entry_date_end']    = 'Date End';
+$_['entry_group']       = 'Group By';
+$_['entry_status']      = 'Order Status';
+$_['entry_status']      = 'Status';
+$_['entry_sort_order']  = 'Sort Order';
+
+// Error
+$_['error_permission']  = 'Warning: You do not have permission to modify sales report!';