You can save enough space to matter by getting rid of language support you don't need in all your application packages. I'm not sure you want to do it when you're short of time, though:

Navigate to each application in the Applications folder. (Some apps are at the top level in that folder, others inside folders within it.)

Control-click (or right-click if you're using an external mouse with two or more buttons) on the package. Select "Show Package Contents" from the drop-down menu.

Open the Contents folder, then the Resources folder inside it.

You'll usually find some folders with the suffix ".lproj." The name of each will be either a language (e.g., "Dutch.lproj") or a two-letter code (e.g., "no.lproj" for Norwegian). Each can be well over a meg, though that depends on how many messages the app needs to localize. Toss any you don't expect to need.

The paranoid among us might want to make a copy of the application or of its folder, as applicable, first and test the app after you've tossed those files to make sure you didn't discard anything essential by mistake. The less paranoid figure that the process is pretty much foolproof, mistakes are unlikely and can probably be caught by a quick check of the Trash before you empty it, and that you can always reinstall software anyhow. Take your pick.