It would be nice if Translate could either remember the last language pair, or at least keep the last 2-4 used languages in the top of the drop down menu (with a horizontal bar to separate then from the full language list).
Most often I want to translate from one specific language (Danish) to another specific language (English), and it would be easier if I didn't have to adjust the source language every time (Danish is often confused with Norwegian, so the “Detect Language“ option is sometimes suboptimal).