prompt user to create an account

[provolone]

I have a website that requires the user to login. If the user is unable to login an account creation screen is shown. While the specifics of this are not important, what is important to me is that the second largest group of people coming to my site are accessing from Japan. The ratio of Japanese users with accounts(the site is free) is not proportional to the number of overall Japanese users.

Not only do I need a correct translation, but it needs to be in the correct context and psychologically suggestive if possible. Previously, I have used multivariate testing to achieve more registration in the English language. I found the most critical elements of the page to be the header and the text on the submit button. Please translate: "Create account", "choose password", "select password", "done", "finished", "complete". Consider that the first three will be optional page headings while the second three will be tested as text on the submit button.

[SumireSatoh]

"Create account"「アカウントを作成してください。」
"choose password" "select password" 「パスワードを決定してください。」

"done" 「完了」
"finished"　「終了」（or「完了」）
"complete"　「完了」

I'm sorry but I don't know how 'to choose' and 'to select' are different.
And 'done' 'finished' and 'completed' can all be 「完了」, I think....