Only č and ! don't work for me with this ini. Pressing c once, twice or more only makes c. Pressing ! once makes nothing, several times make the Spanish inverted ! only, and I can no more get !.
But I had to save the ini in Unicode. Otherwise the some entries in the ini would be lost.
It probably depends on your code conversion table setting.
I have XP in English with a number of additional code conversion tables added under "Regional and language options".