Vendor Order Notification Emails Show Language Constants/Namekeys Only

-- HikaShop version -- : 4.0.1
-- HikaMarket version -- : 3.0.0
-- Joomla version -- : 3.9.1
-- PHP version -- : 7.1.25
-- Browser(s) name and version -- : Firefox 64.0

After cloning production site to a dev/test site, we just upgraded from 2.1.1 (Hikashop 3.5.1) to the following:

HikaMarket build: com_hikamarket_multivendor_v3.0.0_2018-12-14_00-52-46.tar.gz
HikaShop build: com_hikashop_business_v4.0.1_2018-12-14_00-52-12

Our vendor's market order status notification email is now only showing the Language constants/namekeys, and not the actual translations. See attached screenshot.

Joomla and Hikashop are set for English Only, and we have overrides all set within Hikashop.

In HikaMarket, I noticed that other languages are enabled and can be edited -- I don't see how to disable them -- we would like to disable -- all languages other than English are blank in the override section.

When I make a change in HikaShop English override, the changes appear in HikaMarket English Override, which I think is normal and expected, right?

We have always used the core language features, never Falang and never Joomfish. We have continued to leave "Translation published by default" set to "No". Would like to continue as before unless directed otherwise by you. Prefer to avoid another plugin even if extra hoops needed to jump through.

Is there an additional config setting I'm missing? Or an issue/bug because those other languages are enabled in HikaMARKET? Thanks in advance for any help or direction.