someone who imitates another person
他の人を真似する人 (hoka no hito wo mane suru hito)
"She’s such a copycat, always doing what I do."
"彼女はcopycatで、いつも私がすることをします。" (kanojo wa **copycat** de, itsumo watashi ga suru koto wo shimasu)
to forget what you were thinking or saying
to create the base or starting point for something
the least reliable or secure part of a system or group
an easy or unoriginal fix; a copied approach
to have the same opinion as someone else
to say exactly what you think