Yes, give me a second to find out the name of Illarion's font. Yours must be corrupted. You will google it, and replace the new one by the current one on your PC.
In the 'readme' file, you can find:
readme.txt wrote:Configuration in illarion.cfg:
locale Client text locale: de for German, en for english
fullScreen Client runs in fullscreen mode
shortNames Use short names to reference other Players
textFont Name of font for message log. If present, this font will be loaded instead of standard font
textFontSize Size of font in message log
smallFont Name of font for item numbers and map names. If present, this font will be loaded instead of standard font
smallFontSize Size of font for item numbers
menuFont Name of font for context menus. If present, this font will be loaded instead of standard font
menuFontSize Size of font for context menus
scrollSpeed Scrolling speed of message log, 0 turns off soft scrolling
editorCloseTimeout Timeout in seconds until the editor closes when it is empty
toolTipDelay Timeout in seconds until a tooltip appears
lookatDuration Timeout in seconds until a lookat text disappears
fadingTime Time in milliseconds for items in front of character to fade in and out
showNameMode Show no,short,long names in map, switch IG with F12
debugLevel Activate debug mode: 1=Logging to file, 0=Logs off
lastCharacters the names of up to 10 characters entered in the login dialog
rotateMinimap rotate the minimap to match the main map: 1=rotated, 0=north is up
zoomMinimap zoom factor for minimap: 0=no zoom, 1000=maximum zoom
musicOn switches music on and off
musicVolume overall volume of music, 1-100
soundOn switches sound effects on and off
soundVolume overall volume of sound effects, 1-100
lowMemory activates memory conservation mode: 1=save memory, 0=full memory usage
textLog log conversations to file: 1=active, 0=no logging
disableTextureUpdate tweak for graphic cards unable to update textures: 1=enable
relativeMouseWheel tweak for mouse wheel delivering relative coordinates: 1=enable
displayColorDepth16 reduce display color depth: 1 = 16 bit, 2 = 24 bit
disableMouseWrap tweak for mouse position when leaving window: 1=enable
equalPriorityIO run input/output with higher priority. Tweak for slow machines. 1=enable
frameRate desired frame rate. Default is 25
Try changing the font.. Put something generic.. Arial or something..