As the title says, when I cast a close vote using the Android app, it shows a mesage saying "Flag submitted":

enter image description here

It should say "Close Vote submitted" instead, or maybe "Your vote has been recorded" like on desktop. Apparently, this was fixed a while ago, but it seems it has reappeared.

Also, the button on the dialog you get when entering a custom close reason also says "Flag" - it should say "Vote to close" or something like that instead.