I've seen the languages' names like lingua Latīna and lingua Hispānica, but I've read that it's more common to say Latīne and Hispāne. I was wondering if someone had a list of the languages in Latin, since I haven't found in anywhere on internet.
I prefer the adverb ones (those that end in -e) but all way to say it are accepted.
The language names are adjectives in Latin. From Hispanicus you get lingua Hispanica and the adverb Hispanice. The name of the language itself is lingua Hispanica ("the Spanish language"), but typically the best choice for "in Spanish" is the adverb Hispanice. The other forms of the adjective can come in handy, too; languages are simply described differently in Latin than in English. What you need is a list of adjectives.
To get started, I recommend taking a look at names of countries in Latin. The list in the answer includes the adjectives, so you can easily find what it means to speak Danice or Polonice. Of course not all country names are associated with a language and there are languages whose names are not related to a country.
