There are different ways to make different words plural.
You have to remember to make every adjective agree, and change every applicable verb into the "Ellos" form.
For most words that end in "a" or "o", just add S.
So like, La persona es alta = Las personas son altas.
Some words change like "lapiz"
Lapiz - Lapices
Or some that don't end in a or o, just end "es"
El pan - Los panes
Also if you're talking about a plural noun with Gustar, make sure to use Gustan, remembering that the object of the sentence in English becomes the subject,
e.g. 'I like potatoes' becomes, effectively, 'Potatoes please me', so 'please' has to be in the plural: 'Me gustan las patatas'
The word "dicta" is a Latin plural. The singular is dictum.
A "Pilus" is the Latin for a hair, so following the Latin rules for plurals, the plural is "pili".
Tu (singular). Vos (plural).
Tu. (singular) Vos. (plural)
Habes. (singular) Habetis. (plural)
Comitia, maybe? That's plural of comitium. 'Commitia' isn't a Latin word.
Datum - singular, data - plural (like in Latin).
Natavisti (singular "you"); natavistis (plural "you").
Vale! (to singular) Valete! (to plural)
Tu (singular) Vos (plural)
Alumna is a Latin word. (It is the feminine form of alumnus, plural alumni).And the feminine Latin plural of alumna is alumnae.
Depending on whether the you is singular or plural: Curas (singular) Curatis (plural)