What is the name of the markup language used in synonymizers?

Question

Parsing

Many synonymizers use this markup language:

{Cпасибо|Пожалуйста}, у {меня|тебя|них} тоже {|не} завелся {автомобиль|мотоцикл|сервер}.

When parsing, one of the options in brackets is selected.
What is the name of this markup language? And is there a ready-made implementation of such a parser somewhere?