Hello
I visited the site and check if it works for me. In my case the ISO was already there and I was able to download it. I clicked on "Build ISO Again", now it shows an image that asks you for the language (Only English is available), I click "English" but it just give me the same download link for the ISO that was already generated.
I guess I can not test it out if it works or not.
I don't understand what it means "Note: only one language can be built at any one time." Does it mean that you can only choose your language one time and you can no longer change it?, or it means that you can only have on language at a time, for example, you choose English and next week you change to Spanish, and at that moment you can only download Spanish, until you change your language again and generate an new ISO?
Regards