Missing menu translations while updating to OJS-3.4

[rifp]

Describe the issue or problem
The main OJS page does not display any translation text on a freshly unpacked system.

Steps I took leading up to the issue

1. Unpacked ojs-3.4.0-5.tar.gz in the /var/www/html folder of my Apache2 server
2. Adapted config.inc.php and set installed = Off in order to perform an upgrade from Version 3.2.1-5
3. Opened the main OJS page in my browser.
4. I expected to see a page like the one depicted in the installation guide but I got a page full of ##. E.g., the title is ##common.software##

What application are you using?
OJS 3.4.0-5

Additional information
I only had this problem with versions 3.4.0-5, 3.4.0-6.
My installed version 3.2.1-5 has no missing translations.

[rifp]

I have found the solution to this problem, I think.

Apparently, the syntax for the locale setting has changed. The setting that worked with previous OJS versions was

locale = it_IT

With OJS-3.4.0 I have to use

locale = it