Greasy Fork is available in English.
Counts your posts since a reference post in a guild board or a topic
Please note that you need to start a counter to start counting in that topic/guild. Storage sizes would be off the charts otherwise. After you click a start button, you need to go to each page to count your posts in that page.
Basically the order is: find your reference > click in every page between that reference and now > see the count
