If you take a look at the EQ2 official forums in the Tech section there are plenty of solution, the most used is to change langage keyboard while in game by using SHIFT+ALT in chat windows.
If that still doesnt work, here are the configuration it should be (it work for me when shift+alt didn't). Just replace French by you langage keyboard name on the image
Depending on your keyboard, you will have to remap some function key (like the ";" replaced by "m" for french keyboard