As much as possible, please use the words that I said to fix the sentence.
ご質問ありがとうございます。
「文を直して」はfix the sentenceと言います。もっと丁寧に言うためPleaseを付けた方がいいと思います。
「話した単語」はthe words (I) usedとかthe words (I) saidなどと言えます。上記にusedじゃなくてsaidを使った理由はその後にusedを既に使っていますから。
「なるべく」はas much as possibleとかas much as you canなどと言えます。
ご参考いただければ幸いです。
Could you correct my sentence using my own words as much as possible?
Could you correct my sentence using my own words as much as possible?
Can you keep my word choices and just fix what’s wrong?
Please try to use the same vocabulary I used when you rewrite it.
Could you revise it with minimal changes, so I can see what I got wrong?
When you correct it, could you stick to my wording as much as you can?
「なるべく」＝ as much as possible / as much as you can / try to
丁寧で自然なのは as much as possible です。
強すぎず、お願いの感じが出ます。
Could you … as much as possible?
が使いやすいです。
アメリカ合衆国 
