You can make a calendar in any language thanks to the built-in Language Editor that supports Unicode. To create a calendar in the Hungarian language, follow these steps:
Go to the Main tab and find the Calendar Language setting. Here you can see a drop-down list of languages that are pre-installed with the software. Choose Language Editor to modify the language database.
Click Create in the bottom of the screen to add a new language. On the right you can see two tabs that feature Month Names and Weekday Names. Add the names in Hungarian.
When finished, click Save. The language will be added to the database. Now you can select it in the Calendar Language setting and apply it to your customised calendar. Remember that you can always go back and change the language database if needed.