YOU SAID:

My stupid sister sat in the sleeping sourslugs swimming spot

INTO JAPANESE

私の愚かな妹は眠っているサワースラッグの水泳スポットに座っていました

BACK INTO ENGLISH

My stupid sister was sitting in a sleeping sour slug swimming spot

INTO JAPANESE

私の愚かな妹は眠っている酸っぱいナメクジの水泳スポットに座っていました

BACK INTO ENGLISH

My stupid sister was sitting in a sleeping sour slug swimming spot