Hi @jonovski,
No, the same Weblate account should work for translating all parts of the application-- but I think what’s probably missing from your translation is the PKP Web Application Library parts. I’d suggest reviewing those to make sure they’re translated as well.
I haven’t used the Softaculous installer, and we don’t maintain it, so unfortunately I can’t give you much advice there. I suspect it creates the database, and I wonder if it’s missing the specification of a character set, thus depending on the MySQL server’s default character set, which I’m guessing might be Latin1. You can check by running the following MySQL query from the MySQL documentation (using phpMyAdmin or whatever client your server offers):
SELECT @@character_set_database, @@collation_database;
Regards,
Alec Smecher
Public Knowledge Project Team