The relationship b/w the position of yet and the part of sentence bearing the emphasis(and meaning)
1)I haven't yet been able to speak Japanese.

vs

2)I haven't been able to speak Japanese yet.

Question

The relationship b/w the position of yet and the part of sentence bearing the emphasis(and meaning)
1)I haven't yet been able to speak Japanese.

vs

2)I haven't been able to speak Japanese yet.

Answer

Practical English in Use 3rd edition by Swan.

section 566 - still, yet, and already: time

"Not yet" is used to say that something which is expected has not happened (but we think that it will).
...
"Yet" usually goes at the end of a clause, but it can go immediately after "not" in a formal style.

"Don't eat the pears - they aren't ripe yet."
"The pears are not yet ripe. " (more formal)

Answer

"Yet" goes to the end of the sentence regardless.

Answer

Thank you.

Answer

It communicates the same information :) just in a different way! The first option sounds slightly more formal. Both are correct.