Iotacism
Iotacism (i*ō"tȧ*siz'm) , noun
[Greek 'iotakismo`s a laying too much stress upon the iota (ι): compare French iotacisme. See Iota.]
The frequent use of the sound of iota (that of English e in be), as among the modern Greeks; also, confusion from sounding ε, ι, η, υ, ει, etc., like ι. — Littré