But it's also more work to read. A little verisimilitude goes a along way. Of course, not all your characters should talk the same way. We have the attribution tag between an initial word and a sentence that repeats that same word. Assign distinctive speaking patterns to single characters.
Profanity is also important.
It's tricky handling characters who are not native English speakers. No matter what language they're speaking, people tend also to be thinking in that language. Instead, if you want to remind the reader of the character's native tongue, have the character occasionally mutter or think to himself or herself in that language. To learn how to condense and clean up dialog, edit your transcript. Finally, test your fictional dialog by reading it out loud.