One language changed from the Arabic alphabet to the Roman in this century. In addition, it has almost no words longer than six letters, and can easily be distinguished from just about any other language using the Roman alphabet, even at a distance long enough for it to be hard to read. Furthermore, there is a need for no more than two varieties. There's a beach with a name that contains three consecutive identical vowels. In fairness, some of the languages I have in mind are not known to the general public, but are distinctive enough to be regarded by most linguists as individual languages.
None is as obscure as, say, a little-known African dialect or such.
A national language on occasion is printed with a very different spelling from the traditional. It uses the Roman alphabet. No, it's not spoken in Africa. Name a European country that has three principal languages, with several local dialects. I should state in all fairness that many have come from memory, and some would require rather extensive digging to confirm.