"Gladiators are accustomed to fighting."

Translation: Gladiatores pugnare solent.

[ArturoB.E.1]

"Los gladiadores suelen pelear".

[SongPlayz]

Why isn't "Gladiatores sunt pugnare solent." correct?

[Moopish]

solent includes the 'are' from the English.

What you have is like saying 'gladiators are are accustomed to fighting'.