Latin Alphabet?

[sacesta]

The Italian language has only 21 letters. Same letters as in the English alphabet except that there are no letters j, k, w, x or y.

In Latin records the letter j is common. Are the k, w, x and y also not part of the Latin alphabet?

Or put another way, what form of Latin was used by priests to record vital documents in 18th century Italy?

[PippoM]

It's usually a "pidgin" Latin, expecially in villages. I found a lot of gramatically incorrect records, with invented words, too. They also used a lot of abbreviations, and had no rules as to letters.
But in classical Latin, according to Wikipedia:

j was not used in classical Latin, and was introduced in XVI century (yet, it is very common in Latin of priests from then on)
k was present, but very rare (limited to a few words)
w did not exist
x was part of the alphabet
y was considered a foreign letter, a grecism.

[sacesta]

Thanks Pippo!
This knowledge is helpful in deciphering the texts.
Steve