YOU SAID:

english underwear is significantly lower in quality than french underwear

INTO JAPANESE

イギリスの下着はフランスの下着に比べて品質が著しく低い

BACK INTO ENGLISH

British underwear is of significantly lower quality than French underwear.

INTO JAPANESE

イギリスの下着はフランスの下着に比べて品質が著しく低いです。

BACK INTO ENGLISH

British underwear is of significantly lower quality than French underwear.