XkbInd (X Keyboard Extension Indicator) is a
small, simple, but useful indicator of keyboard
layout (XKB group) for the X Window System. It
indicates the current keyboard layout in the title
of top-level windows via a prefix to the original
string. XkbInd allows the user to simulate
independent keyboard layout for each handled
window, and it works with most window managers,
including twm, mwm, and fvwm.