language problem

-- HikaShop version -- : 31.1
-- Joomla version -- : 3.7
-- PHP version -- : 7
-- Browser(s) name and version -- : all
-- Error-message(debug-mod must be tuned on) -- : none

Hi,
I installed Hikashop on a test website with 2 languages (joomla native translations, so everything duplicated).
I then de-activated the English language, having the Italian language active in Hikashop (deleted all EN menus and 'duplicated' content).
However, everything to do with Hikashop remains in English and not Italian.
I have clearly done something wrong, but I can't find what? Have been looking on the forum but can't find this specific case.
I did reactivat the EN language and made a home menu and then could actively choose IT / EN, but this not change anything (probably logically as you clearly state everywhere the Falang is necessary).
Hope it is easy to solve?
(also since I have Calc Builder with various calculations and reinstalling Hikashop after I install Falang, just to test and see if this works, might not be very easy, but I did not try, afraid I would loose all CalBuilder calculations)
Thanks!

Thanks for your explanation.
My problem is that I have Italian and English installed, but Hikashop is only using the English language file. See the test website I had indicated.
The joomla part uses the Italian file, Hikashop only the EN.
Hope you can help!
Thanks

Thanks for this. I have seen it.
The screen is now different, however the language files are both there and I made an override which joomla is using correctly, but only that part.

Playing around with this, however and changing one translation, now it is working. Very odd. I changed (in the language override file) :
PER_UNIT=" caduno" into:
PER_UNIT=" a pezzo"

I guess this can not have been the solution ... however, the language file is now correctly picked up!