What's the plural form of supercherie? Here's the word you're looking for.
Answer
The noun supercherie can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be supercherie.
However, in more specific contexts, the plural form can also be supercheries e.g. in reference to various types of supercheries
or a collection of supercheries.
Examples
According to France's foreign minister, the British foreign secretary is guilty of perpetrating a supercherie.