The Turkish Education Ministry asked publishers of the journal Can Mathematics to remove the letters P and K from any of its algebraic equations.
In place of P and K, the journal is allowed to use E, G, F, and H in algebraic statements to avoid "wrongful misinterpretations."
Their reasoning is that the presence of the variables P and K in the same algebraic statement prompts the acronym PKK, which stands for the Kurdistan Workers Party, a banned Kurdish rebel faction.
The publishers obeyed the request. Now if we can only get American publishers to avoid lettering geometric figures using letters that can spell off-color words, plus extinguish the notion that triangles are congruent if they meet the ASS condition!
Source: Math-History-List Archives, Jan. 30, 2000