YOU SAID:

You need to trim those nails.

INTO JAPANESE

爪を切り落とす必要がある

BACK INTO ENGLISH

We need to cut off the nails.

INTO JAPANESE

爪を切らないと

BACK INTO ENGLISH

I need to cut my fingernails.

INTO JAPANESE

指の爪を切らないと

BACK INTO ENGLISH

I need to cut my fingernails off.

INTO JAPANESE

指の爪を切らないと

BACK INTO ENGLISH

I need to cut my fingernails off.