WARNING: George...shut your eyes and plug your ears.
Problem: Today I went to do a Bible Word study for a Greek word and started to enter the Greek work without putting g: first. Fortunately when I didn't see a drop-down of Greek words I knew to put g: in there. However this is not necessarily common knowledge and I could see someone having to look it up.
Solution: In the drop-down box, when g: or h: is not used have three lists separated by headings "English", "Greek", and "Hebrew". As you keep typing the incorrect languages will quickly lose some of the likelihood and the correct language will become more obvious.
If others like this suggestion I'll let them take it to UserVoice :-)