" How do you say ...X.... in Japanese?" .......を日本語で何といいますか? "My Japanese is poor, please speak slowly" 日本語が下手ですので、どうかゆっくり話して下さい。 Hope this helps. Hang in there!

.......をにほんごでなんていいますか？ ゆっくりとはなしてください I omitted " My Japanese is poor " because it would sound unnatural in a colloquial sentence. It's better saying it like this.