Yup. Some letters can get you in real trouble in some places:
A Turkish court fined 20 people for using the letters Q and W on placards at a Kurdish new year celebration, under a law banning characters not used in the Turkish alphabet, rights campaigners said Tuesday.
The court in the southeastern city of Siirt fined each of the 20 people 100 new lira for holding up the placards, written in Kurdish, at the event last year. The letters Q and W do not exist in the Turkish alphabet, but are used in Kurdish.
Of course, it’s not lingual purism solely, but (naturally) a matter of nationalistic politics.
The 1928 Law on the Adoption and Application of Turkish Letters changed the Turkish alphabet from the Arabic script to a modified Latin script and required all signs, advertising, newspapers and official documents to only use Turkish letters.
Many shops and companies in Turkey have names, signs and advertising using the letters Q, W and X which are not used in Turkish, in apparent violation of the 1928 law, but have not been prosecuted.
(via Design Observer)