"Bye, Miss!" and "Hi, young lady!" are English equivalents of the French phrase Salut, Mlle! Context makes clear which form suits regarding la mademoiselle ("the young lady"). The pronunciation will be "sa-lyoo mad-mwa-zel" in French.
The equivalent of Miss in French is Mademoiselle. The abbreviation therefore is Mlle.
Spanish is Spanish where ever in the Spanish-speaking world. Regionalisms exists in all languages. No such word....seems to be missing a vowel. Mlle is the French abbreviation for Madamoiselle, which corresponds to Ms. in English. It may be possible that you are looking at a French document.
Mademoiselle means 'Miss'. Shortened to mamselle in speech and Mlle in writing.
Mlle.
Mlle - mademoiselle
Mme. Mademoiselle is Mlle.
Miss is "mademoiselle" in French; this is abbreviated "mlle".
Mlle For example, a woman called Jeanne Boudier may be addressed as Mlle Boudier. Mlle is short for Mademoiselle and is only for unmarried women.
It's not French
Monsieur/Madame/Mademoiselle
Petite Mlle Fancy
Mme.It's Mlle. Mme is the abbreviation for Madame.