"They love reading at night."
Translation:Les encanta leer en las noches.
Because 'They' is not the subject of the sentence. It is more something like: [To read at night] enchants them.
If you have something like: '[The nights here] enchant them.' it would be 'encantan'.
You need a plural pronoun after "a": "A ellas les encanta leer ...", "A ellos les encanta leer ...", etc.
Because 'They love' is already conjugated. :-)
This is literally 'They love TO READ' where 'to read' is unaltered, even in the English form.
If it is THEY LOVE it would be ellos encantaN which is different than earlier comments
No -- sentences containing "encantar" are formed the same as sentences containing "gustar." To say this sort of thing in English we have a subject (they), a verb (love), and a direct object (reading). They love reading. This is the most familiar order of things for us.
To say it in Spanish, the order is inverted. First we put an indirect object (they/les), a verb (love/encanta), and the subject (reading/leer). Les encanta leer.
Spanish verbs are always conjugated to match the subject, regardless of whether it appears before or after the verb. When the subject is an infinitive verb, the conjugation takes the third person singular (él/ella) form: encanta.
If we were to replace the subject in this sentence with something plural -- books, for example -- then we would use "encantan":
- Les encanta el libro, they love the book.
- Les encantan los libros, they love books.
In English the -ing form of a verb (like "reading") serves at least two purposes. It can be the present participle: "I am reading" or it can be act as a noun to name an activity: "Reading is my favorite hobby." Spanish verbs have a present participle form that ends in "-ndo" (like "leyendo"), but the infinitive form is used when naming an activity, in this case "leer."
From Yabla: "Moreover, in some situations, using the verb amar is more natural than using querer. This is especially true when you are talking about your love for inanimate or abstract things, like nature, a musical genre, etc. " https://spanish.yabla.com/lesson-Amar-y-Querer-763
The verb encantar means (roughly) to enchant. Like gustar in can be confusing to an English speaker because it reverses the subject and object. In this sentence if you use encantar then the subject (the thing doing the enchanting) is leer (reading) which is singular; hence, encanta is correct. If you use the amar (to love), then "they" is the subject (the ones doing the loving) which is plural; hence, aman is correct.