For instance, I entered the text: "That box is fragile.", for which
Translate returned something closer to "That square is
fragile."  (It's ambiguous what sense of "box" is meant here.)   The
first thing that would be helpful is to be able to click on each word
in the translation to better understand how it's being phrased in the
other language.

Even better would be the ability to clarify the meaning of what's
being written.    For instance, if I wrote "Please set the table
carefully." that could mean many things (is the table being carried
somewhere? or are dishes being placed on it for a dinner?).  It would
be great if there were an interface to identify the sense in which a
word or idiomatic phrase is being used.

Thoughts?