When voting to close a question as off-topic and choosing the "other" option, you're given a text field in which to write your reason(s). In the Web interface, that field includes the helpful default text:
I'm voting to close this question as off-topic because
...and one can simply complete the sentence.
When used by a moderator, though, that language seems a little off. A moderator's vote is binding and immediate. While technically correct, I think it would better represent reality if for diamond moderators, the default text was:
I'm closing this question as off-topic because