Actors who Learned a New Language for a Role
Learning lines is one thing. Learning an entirely new language so those lines sound natural on camera is something else. Many actors have taken that leap to serve a story, tackling vocab, grammar, and pronunciation so their characters could speak in ways that feel true to the world on screen.
This list looks at male actors who put in the work to speak a language they did not use before the role. You will see projects across films and series, along with the languages they studied, how they prepared, and where those skills show up in their performances.
Robert De Niro
For ‘The Godfather Part II’ he studied the Sicilian dialect to play the young Vito Corleone. He worked closely with a dialect coach and rehearsed entire scenes in Sicilian so he could speak fluidly with native speakers on set.
Much of his dialogue in the film is delivered in Sicilian. He uses the dialect in conversations set in Sicily and in Little Italy scenes, keeping the speech patterns consistent across quiet family moments and tense meetings.
Colin Firth
For ‘Love Actually’ he learned Portuguese so his character could connect with Aurelia. He focused on pronunciation and everyday phrasing, practicing lines that would be spoken at a natural pace in romantic and family settings.
Several scenes feature conversations entirely in Portuguese. He exchanges questions and answers with a native Portuguese character, responds in complete sentences, and navigates longer speeches that show clear command of basic grammar.
Adrien Brody
For ‘The Pianist’ he studied Polish and also prepared German dialogue to match the languages heard in occupied Warsaw. He trained with coaches who drilled pronunciation and meaning so the words carried the right weight in each situation.
He uses both languages in interactions with soldiers and civilians. Short instructions, questions at checkpoints, and quick exchanges in apartments and streets are delivered in the appropriate language for the moment.
Andrew Garfield
For ‘Silence’ he learned Japanese to portray a Jesuit missionary working among villagers and authorities. Preparation covered religious vocabulary, everyday conversation, and respectful forms of address that fit the setting.
On screen he speaks Japanese in interrogations and in quiet conversations with believers. He uses it to recite prayers, ask questions, and respond to challenges from officials and interpreters.
Daniel Day-Lewis
For ‘The Unbearable Lightness of Being’ he trained in Czech to support scenes that required local dialogue. Work with language coaches emphasized rhythm and consonant clusters that are common in Czech words.
He delivers Czech lines in conversations with Czech cast members. The language appears in social settings and in private moments, and he maintains the pronunciation patterns while shifting between languages as the story moves.
Ken Watanabe
For ‘The Last Samurai’ he undertook intensive English study so major scenes could be played without an interpreter. Training included daily practice with tutors, script work, and rehearsals that emphasized clarity and pacing.
He delivers extended English dialogue during strategic discussions and philosophical exchanges. He also switches between English and Japanese when speaking with different characters, keeping sentence structure and wording precise.
Keanu Reeves
For ’47 Ronin’ he learned Japanese phrases and formal address used in samurai settings. Preparation focused on honorifics, set expressions, and the vocabulary tied to sword practice and etiquette.
He later used Japanese again in ‘John Wick: Chapter 4’ during scenes set in Osaka. He speaks with Japanese characters in brief exchanges that include greetings, requests, and acknowledgments that fit the action.
Wagner Moura
For ‘Narcos’ he learned Spanish from the ground up since he is a native Portuguese speaker. He moved for immersion, worked with tutors, and used Spanish throughout rehearsals and daily life while production was underway.
Across the series he speaks Spanish in long monologues, phone calls, and negotiations. He interacts with Colombian actors in Spanish during family scenes and business meetings, holding conversations that run for several minutes without switching languages.
Jim Caviezel
For ‘The Passion of the Christ’ he studied Aramaic and Latin to meet the film’s language plan. He learned pronunciation and meaning through coaches and recorded practice so long passages could be delivered in full.
He speaks both languages in many scenes. Aramaic appears in conversations with disciples and in quiet prayers, while Latin is used with Roman authorities, each kept consistent with the setting.
John Krasinski
For ‘A Quiet Place’ he learned American Sign Language to build the family’s communication system on screen. He trained with an ASL coach and rehearsed with Millicent Simmonds, integrating visual grammar and facial markers into performance.
He uses ASL in scenes that cover daily routines, warnings, and emotional exchanges. The signing carries plot information and timing cues, and it remains accurate while characters move through different locations.
Ansel Elgort
For ‘Tokyo Vice’ he studied Japanese to portray a reporter working inside a Tokyo newsroom. Study included conversation, news vocabulary, and reading that supported script work and interviews within the story.
He holds Japanese conversations with editors, sources, and police contacts. Meetings and street encounters feature full sentences, follow up questions, and quick replies that match the pace of a busy beat.
Timothée Chalamet
For ‘Call Me by Your Name’ he learned Italian to play a character who lives and studies in Lombardy. He practiced daily conversation, local expressions, and clear pronunciation, along with line runs that mixed Italian and English.
He speaks Italian in family scenes, errands, and friendly chats. He also switches smoothly between Italian and English within the same conversation, matching how multilingual households often talk.
Share your favorite examples in the comments and tell us which transformations surprised you most.
