Conversation so far:
What did James Strachey translate?
Certainly when translation into English first began.
What did he translate into English?
plain German.
What texts that were written in German did he translate?
example his "I" and his "It" become the Ego and the Id.
Lacan took particular exception to "the translation of instinct for Trieb [drive] ...
Was he translating Freud's works?
Freud only in Strachey's English translation cannot understand.

Question: What cannot be understood in the English translation?
Self-contained rewrite: What cannot be understood in Strachey's English translation?