[2022] Did I read It Wrong French Cruisers ! Not BattleCruisers ?

The French CA's are fast, mobile, and hit extremely hard. They do not tank well and don't hold up under sustained fire, so camping with a ship like this is not a play-style that will find you much success

"Battlecruiser" is not an official term in World of Warships that translates in to something specific. We have cruisers and battleships as classes and each brings with it a set of actual game-values. For example, Battleships burn longer and have slower reload times on their damage control party than cruisers, but also longer action times.

"Large Cruiser" is a term we use to indicate a cruiser that also possess' the burning characteristics of a Battleship, but still maintains the DCP action time and reload of a cruiser. This is the official WoWs term, but people often refer to them as "Supercruisers" like Alaska, Stalingrad, Agir, Siegfried.

"Battlecruiser" is a term that historically meant a ship that was the size of a battleship, possessed the weapons of a battleship, but lacked armor to increase speed in order to keep up with and engage cruisers. In WoWs, an example of a ship that fits that profile is the T6 Repulse: having weak armor, high speed, and BB-caliber guns. The German BB line ending in Schlieffen is another example of a BB that is often called a "Battlecruiser", while the Siegfried also fits this bill but is designated as a Cruiser.

Then there are also "Light Battleships" that possess all the characteristics or a Battleship, but just seem to be downscaled a bit. Dunkerque and Strasbourg are examples of this - with weapon calibers that are still BB, but are relatively small and quicker than other BB's. Scharnhorst also fits this bill as it is a Battleship in terms of armor layout, but possess' a gun caliber that you might find on a Large Cruiser.

Officially, a cruiser that burns like a Battleship is a "Large Cruiser", regardless of gun caliber. Stalingrad, Agir, Alaska, Harlem, JohanDW, and Gouden are all "Large Cruisers".

Personally, when a cruiser that burns like a battleship ALSO has large caliber guns, I tend to refer to them as "supercruisers" like much of the community does, but this is a colloquial term used by the community and not the term World of Warships uses to denote a cruiser that burns like a battleship.

Possibly, but not officially yet. CB in naval parlance refers to "Large Cruiser", while CC refers to "Battlecruiser", but we do not use it internally the way we use CL, CA, BB, CV, DD because we are trying to keep things less complicated in this manner. That does not mean, however, that it cannot change in the future. If enough Large Cruisers are in the game to the point where being designated CB instead of CA is deemed more helpful than confusing, it may happen. Generally speaking, there are only 5 classes of ship in World of Warships:
DD - Destroyer
CA - Cruiser
BB - Battleship
CV - Aircraft Carrier
SS - Submarine

"Battlecruisers" is a term telling you something about the characteristics of a Battleship. If you are an aficionado of internet Naval History you will encounter a long and somewhat arbitrary argument over whether things were every truly "battlecruisers" or whether they were merely battleships. Every person has their own way of understanding and succinctly describing the characteristics of a ship, so there will be some variance. We're still people .
For example, I will refer to the new German BB line as Battlecruisers, because that is the fastest way I can reference them and the way they should be played: HUNTING CRUISERS. I will refer to the Repulse as a Battlecruiser because it's fastest, poorly armored, but still possesses Battleship firepower. It's job is to chase down and sink cruisers, which was the Battlecruiser role in real life. They are still battleships for game mechanic purposes.

Cruisers and destroyers have variances too - the Zorkiy is basically a light cruiser, but is still technically a Destroyer. The Khaba, Kleber, and Ragnar all push the boundary between DD and CA/CL because they perform more akin to what a light cruiser does than the majority of DD's. They are not CALLED CL's because DD means they have no citadel and have specific standard times on their DCP consumable.

There was no reason to avoid referring to "Large Cruisers" as "Supercruisers" until the introduction of Superships, when the language began to get confusing. Annapolis is a Supership Cruiser, but not a "Supercruiser" in the way the community understands it: burns like a BB. Stalingrad is a Large Cruiser, often called "Supercruiser", but is not a supership.

We're in the process of making sure things are as clear as possible across our upcoming publications and where it comes up in-game.