FVWM icon title size

Is it possible somehow to limit full icon title length? It is appears when icon is hovered with mouse cursor.

I know that it is possible to use “IconTitleFormat”, or to disable icon title completely, it is possible to use “!IconTitle”,
but I want to use default “IconTitleFormat %i”, but with limited length, or maybe it is possible to disable icon title expansion when it is hovered with mouse cursor?