"È lei."

[sanjayananda]

Can't this also be translated as "It's you."? How can we tell the difference if both translations for lei (her and you) are given when the word is hovered over?

[quetzal1234]

Lei (formal you) is usually capitalized, though it doesn't have to be. Lei (her) follows our rules of capitalization. I haven't gotten far enough in this site to tell you whether they always capitalize Lei or not, but I believe they do.