YOU SAID:

my sister is now on vacation in Tokyo and will spend two weeks there.

INTO JAPANESE

私の姉は東京で今は休暇中と 2 週間も過ごすことになります。

BACK INTO ENGLISH

My sister is in Tokyo right now during the holidays and will spend a week or two.

INTO JAPANESE

私の妹は今休暇中は東京と、2 週間過ごすことになります。

BACK INTO ENGLISH

My sister is now holiday in Tokyo and will spend two weeks.

INTO JAPANESE

私の妹は今休日東京と 2 週間過ごすことになります。

BACK INTO ENGLISH

My sister now holiday in Tokyo and will spend two weeks.

INTO JAPANESE

私の妹は今東京の休日し、2 週間過ごすことになります。

BACK INTO ENGLISH

My sister's Tokyo holiday, will spend two weeks.

INTO JAPANESE

私の妹の東京の休日、2 週間過ごすことになります。

BACK INTO ENGLISH

You will spend the holidays my sister Tokyo, two weeks.

INTO JAPANESE

私の妹の東京、2 週間休暇を過ごすでしょう。

BACK INTO ENGLISH

You will spend the holidays my sister Tokyo, two weeks.