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The approach of it is a bit different to what MS Visio has as it is a 3D tool and provides other tools like autodiscovery of networks. And it's cross-platform
You should be able to see the yosemite installer in the AppStore. Follow the instructions here to create a bootable disk for yosemite (os x 10.10). Similar instructions can be found for mavericks or older versions with a simple google search. Then format the harddrive and install linux. Then download vmware or your preferred vm client and set up the vm ...
You could try to download the Yosemite installer (or another OSX version if your "purchased" it earlier) and try if you can install a virtual machine with it. You could also visit this link (it is for parallels, but maybe it will also work with virtual box): http://kb.parallels.com/en/118806
Thanks to jherran’s comment I found the app: QuickCursor from Hog Bay Software (GitHub repository).
This may not be quite what you're looking for, but have a look at Flashlight. It allows you to use plugins for Spotlight, including translation plugins. I don't think the translation ones are offline, but it's open source, so maybe you could figure out a way to download an offline translation dictionary and modify an existing plugin to use this offline ...
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