Currently BIAB 2014 build 381 Chord Entry does not support properly usage of international PC keyboards.

For example, I use a scandinavian keyboard with this kind of key layout:

http://upload.wikimedia.org/wikipedia/en/c/cf/Keyboard_Layout_Swedish.png

and when I try enter into a cell a chord C7/E by typing it, it shows in the small window as "C77E" and is not accepted when I hit the enter key.
I found out by experimenting that I am able to input the character "/" by pressing the key "'" (next to the Enter-key) on my keyboard - I assume that's because the US keyboard has the "/" character there.

However, when I choose a cell with mouse, then right-click, then choose "Edit current chord" I can type the character "/" correctly there from my keyboard.

In RealBand the behaviour is a bit different:
there is no possibility to edit a chord with a right-click of the mouse, so the only way to enter character "/" to a chord is to know to press the "'"key.