I tried to look at source code of language selector
in the file GtkLanguageSelector.py there is a method def setupLanguageTreeView(self) and in this method there is a call to "column.set_cell_data_func (renderer, lang_view_func)" if i comment out this function redrawing of the list becomes fast. So there is probably something strange in the lang_view_func. But i don't understand yet what this function is doing :D.
I tried to look at source code of language selector
in the file GtkLanguageSele ctor.py there is a method def setupLanguageTr eeView( self) and in this method there is a call to "column. set_cell_ data_func (renderer, lang_view_func)" if i comment out this function redrawing of the list becomes fast. So there is probably something strange in the lang_view_func. But i don't understand yet what this function is doing :D.