"You can have as many ArchiCAD's in your computer as you need - different versions and languages - they all are going to work with the same licence." i don't know this information before. i'll try
Just make sure they are all installed to separate program folders.
By default, each version (22, 23, 24) will install to its own folder, but the language versions will install to the same folder.
You should be able to specify a folder location as you install, or you can simply rename the folder after installation.
i.e. Archicad 24 ENG, Archicad 24 JAP.
I would keep the default one that you use most of the time as just 'Archicad 24' which is the default.
Also if you ever want to update to a newer build, you may need to rename the folder back to it's default.
I can't remember if the updaters allow you to choose a location (folder) that you want to update or if they just go to the default.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10