You should be able to record a macro of yourself making the switch and link
it to a shortcut key. Then record a macro of yourself switching back, and
link it to a shortcut key. (people who are good with macros could write a
macro that toggled, so that you only needed 1 shortcut key)
Record Macros via Tools | Macro, Record New Macro. Give it a name. After
you finish recording your actions (hit stop on the macro toolbar), then go
into Tools | Customize, Keyboard, find Macros in the left column, and the
name you gave it in the right column, and assign a shortcut.
Using foreign languages on a Mac, you may find it helpful to know that there
are Mac-specific newsgroups.
See here for gateway to Mac-specific ngs:
<
http://www.microsoft.com/mac/community/community.aspx?pid=newsgroups>
If you have problems with this, you should probably post there for help.