/usr/lib/interchange/standard/include/ is in interchange-cat-standard 5.7.7-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/interchange/standard/include/checkout/
/usr/lib/interchange/standard/include/checkout/billing_address
/usr/lib/interchange/standard/include/checkout/initialization
/usr/lib/interchange/standard/include/checkout/login_form
/usr/lib/interchange/standard/include/checkout/mailing_status
/usr/lib/interchange/standard/include/checkout/new_browser_payment
/usr/lib/interchange/standard/include/checkout/new_browser_payment_multi
/usr/lib/interchange/standard/include/checkout/old_browser_payment
/usr/lib/interchange/standard/include/checkout/old_browser_payment_multi
/usr/lib/interchange/standard/include/checkout/payment_select
/usr/lib/interchange/standard/include/checkout/payment_select_multi
/usr/lib/interchange/standard/include/checkout/shipping_address
/usr/lib/interchange/standard/include/checkout/shopping_cart
/usr/lib/interchange/standard/include/checkout/tax_popup
/usr/lib/interchange/standard/include/forum/
/usr/lib/interchange/standard/include/forum/reply_form
/usr/lib/interchange/standard/include/forum/submit_form
/usr/lib/interchange/standard/include/layout/
/usr/lib/interchange/standard/include/layout/leftonly
/usr/lib/interchange/standard/include/layout/leftright
/usr/lib/interchange/standard/include/layout/noleft
/usr/lib/interchange/standard/include/menus/
/usr/lib/interchange/standard/include/menus/MiscFunction.txt
/usr/lib/interchange/standard/include/menus/OrderView.txt
/usr/lib/interchange/standard/include/menus/Products.txt
/usr/lib/interchange/standard/include/menus/Saved.txt
/usr/lib/interchange/standard/include/menus/Top.txt
/usr/lib/interchange/standard/include/menus/Untitled.txt
/usr/lib/interchange/standard/include/menus/catalog/
/usr/lib/interchange/standard/include/menus/catalog/line.txt
/usr/lib/interchange/standard/include/menus/catalog/service.txt
/usr/lib/interchange/standard/include/menus/catalog/top.txt