Multi-language keyboards (Alt-Shift) with Code Editors and IDEs (Eclipse, PHPStorm, etc)

I'm a VIM user, once again evaluating graphical IDEs to see if it is worth switching. I've noticed that many IDEs, such as Eclipse and PHPStorm, have keyboard shortcuts that include Shift-Alt-something. Windows uses Shift-Alt as the language-switching shortcut, as such many other environments use this as well (Gnome, and my company has KDE configured with this shortcut as well).

How do typical multilingual developers handle this conflict?

Obviously I could easily remap either the language-selection shortcut, or remap the IDE shortcuts. However I would like to know if a canonical solution exists, as each method has its drawbacks. If I remap the language-selection shortcut, then I won't be able to use muscle-memory to switch language on other computers. If I remap the IDE shortcuts that I use, then I have hours of remapping to do and I'll no longer be able to look them up online, as I won't remember what I remapped the lesser-used shortcuts to.

Surely there is a large pool of multilingual software developers who use graphical IDEs.

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