"We congratulate you to this most important result " - I came across this usage in a speech of fair importance, hosted on a distinguished portal. This speech may not have been delivered in English, but I suppose the translations should pass muster as well.
I wonder if this usage is correct - "to" following a congratulatory note?
Update - I came across this while reading the nobel presentation speech honouring Sir James Chadwick.
1935 Chemistry Nobel presentation speech
If we read towards the very end, Sir James is congratulated to the important discovery.