SoftMaker.com

@kgha: Could you please also check the status of the checkbox "Use XIM" in the "System" tab of the TextMaker options?
Is it checked, unchecked or grayed out?

1: Slackware -current 64bit, MATE desktop (no KDE stuff installed)

2: System language English, no particular regional settings except for clock (CET), Swedish keyboard:

3: No other tools installed affecting the keyboard

4: Example, acute/grave accents: the accent key is the same on Swedish and ...