Ignored until recently and therefore relatively undocumented, the manifestation of ideology in the process of translation has become an increasingly important issue in translation studies. After discussing several definitions of ideology as related to language and giving a short overview of the translations theories dealing with it, the paper focuses on two translation situations, i.e. conference interpreting of European institutional discourse and ad-hoc interpreting as practiced in Romania of “behind the Iron Curtain”, meant to illustrate how ideology can affect the “rewriting” of the source text.