Localizing into Japanese

I see that Japanese is not one of the included lng files. Is there any way to use SetupBuilder for creating a Japanese installer? I found a post showing how to set strings in the script based on the current language, but that will not help me with dialogs or with all the built-in strings in these lng files.

Hello,

Unfortunately, Japanese is not a supported language :(

Would you please be so kind to send an email to our support [at] lindersoft [dot] com and refer to this thread? I would like to contact you via email to discuss this.

Thank you!

Friedrich