xkbind

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X Keyboard Extension Indicator is a small and simple, but useful indicator of keyboard layout (XKB group) for the X Window System; it outputs information about current keyboard layout attached to each top-level window through their captions via prefixes to original title strings. XkbInd allows to simulate an independent keyboard layout for each handled window and it can work with most of the window managers, including TWM, MWM and FVWM.