The fourth episode of "Can This Love Be Translated" unfolds with preliminary interviews for Hiro and Mu-hee, revealing who they will be traveling with during the show. Mu-hee is pleasantly surprised, while Hiro's reaction carries a hint of unease. The show's first stop is in Canada, where the actors and crew settle into their hotel. Mu-hee finally realizes that Hiro was the one who caught her on the red carpet, and she asks Yong-u about Ho-jin. Yong-u tells her to focus on Hiro instead.
However, Hiro is not too keen on starring alongside Mu-hee. Producer Kim convinces him to continue with Ho-jin's help, but asks Ho-jin to keep this fact under wraps. In return, Ho-jin requests that the crew call Mu-hee by her real name instead of Do Ra-mi.
Ho-jin arrives at his hotel room, which he shares with Yong-u, and asks Yong-u if Mu-hee likes Hiro. Yong-u confirms that she does, and later relays this conversation to Mu-hee. Mu-hee uses Yong-u as an excuse to go see Ho-jin, but he quickly figures it out.
They go for a walk and catch up with each other. Ho-jin mentions that his brother is getting married the following week. As for Do Ra-mi, Mu-hee still sees her and taunts and insults her. Ho-jin points out that these comments are Mu-hee's own thoughts since they're all happening in her head. But Mu-hee can't describe these comments to Ho-jin because it would be like reading her diary.
Mu-hee isn't the only one haunted by Do Ra-mi. Hiro wakes up from a nightmare about her as well. His assistant tells him that Mu-hee is planning a surprise for their first meeting, and he probably should do the same. Hiro reveals that he's not mad about Mu-hee not recognizing him. Rather, he's annoyed at what her "zombie" image will do to his romantic one.
Mu-hee asks Ho-jin what Hiro thinks about her, but he refuses to say anything. He insists that his role as an interpreter is to translate without adding his own emotions. He then tells her not to listen to Do Ra-mi, even if she gives voice to Mu-hee's insecurities. He's about to tell her something else when Yong-u interrupts them, and Mu-hee has to leave.
The crew prepared for the actors' first meeting as Mu-hee and Hiro found themselves in a park, connected through earphones with Ho-jin as the interpreter. Hiro released a string of colorful balloons, challenging Mu-hee to follow them, eventually wearing her out. However, Ho-jin secretly aided her in finding him faster. When Hiro playedfully criticized Mu-hee's film, Ho-jin tactfully filtered some of his words. When Mu-hee gifted him a heart made of maple leaves, he whispered, "This is the worst," which Ho-jin overheard.
Suddenly, a speck of dust entered Hiro's eye, causing his contact lens to fall out. He refused to continue filming without a replacement. The shoot came to a halt. Ho-jin confronted Nanami, Hiro's manager, and insisted they solve this problem quickly and quietly. She shared something with Ho-jin that might change Hiro's mind.
Ho-jin grabbed all the Korean snacks Yong-u brought and put them in a bag, claiming he was going to meet a friend downtown. Mu-hee, eager to apologize to Hiro for the dust incident, tagged along with Ho-jin. He warned her not to meet Hiro without him. He then went to meet his friend, exchanging the bag of snacks for a thin envelope.
Meanwhile, Mu-hee spotted Hiro on the street, taking photos and looking perfectly fine. Do Ra-mi appeared and urged Mu-hee to throw a rock at Hiro. But Mu-hee hesitated, and Hiro, noticing her, walked away. Ho-jin arrived and finally revealed the truth to Mu-hee: Hiro didn't want her cast in the film initially.
Ho-jin then went to see Hiro and gave him the thin envelope. This changed Hiro's mind, and he agreed to resume filming. Ho-jin rushed to find Mu-hee, who had turned off her phone. On the drive back, Ho-jin confessed that he hadn't fully translated Hiro's words during the shoot. He also agreed to translate everything she said, including curse words, even though it broke his rule of not translating such language.
On the set, Mu-hee heeds Ho-jin's advice and proves to him that she's not someone to be underestimated. With her fist raised, she strides towards him, ready to strike—but at the last moment, she transforms it into a heart. This sudden gesture causes Hiro's heart to race. We then uncover the truth behind the thin envelope. Hiro has long dreamed of attending an ice hockey game, and Ho-jin has managed to secure those coveted tickets for him.
A flashback reveals Hiro speaking with the show's writer, producer, and Ho-jin. The writer advises him to be honest and not force a smile if he doesn't feel like it, but to be open to the possibility that he might grow to like Mu-hee. Hiro pledges to confess his feelings if he begins to fall for her.
The episode's final scene shows Mu-hee rushing towards Ho-jin, only to find him chatting with Ji-seon!
