I remember reading somewhere that there is a kabbalistic tradition to say the parts of davening that are in Aramaic (e.g. the targum in Uva Letziyon) quietly. What is the source for this?
The Rema in OC 61(26) says the custom is to say the first possuk of the shema aloud. In this question Sh'ma aloud but amida quietly Gershon Gold said that Shema is said aloud in unison and msh210 ...