YOU SAID:
she sells sea shels by the seashore
INTO JAPANESE
彼女は海岸でシーシェルを売っています
BACK INTO ENGLISH
She sells Sea Shell on the coast
INTO JAPANESE
彼女は海岸でシーシェルを売っています
BACK INTO ENGLISH
She sells Sea Shell on the coast
That didn't even make that much sense in English.