solecistic

enUK

sol·e·cism

S0546400 (sŏl′ĭ-sĭz′əm, sō′lĭ-)n.1. A nonstandard usage or grammatical construction.2. A violation of etiquette.3. An impropriety, mistake, or incongruity.
[Latin soloecismus, from Greek soloikismos, from soloikizein, to speak incorrectly, from soloikos, speaking incorrectly, after Soloi (Soli), an Athenian colony in Cilicia where a dialect regarded as substandard was spoken.]
sol′e·cist n.sol′e·cis′tic adj.