Anyone know how I can make the extension of the last letter?
I know the font is Lavanderia

Lavanderia  Suggérée par Lancon 

You can use the alternates and swashes

Yes I know
But I want to know how to make the extension of the last letter ... The font doesn't bring the option :(

Excuse me @rowenita, maybe I didn´t explain very well.
You can see more or less how to do it in the tester of Losttype.
I think some other members could tell you better how to reproduce the glyph

That y is not in the character set. It has to be added with a font editor or if you need it for only one occasion in one word with a vector editor. You would get something like this: