It's not clear from your comment. It implies that it was not made by anybody on your company, but it doesn't assert it (and there are plenty of cases where one would google about something somebody nearby had developed).
And the GP is not missing your point, you are missing his. He is trying to point that if it was an internal development maybe your language was indeed rude (that really depends on a lot of context to decide). If that's the case, your manager may not be wrong.
And the GP is not missing your point, you are missing his. He is trying to point that if it was an internal development maybe your language was indeed rude (that really depends on a lot of context to decide). If that's the case, your manager may not be wrong.