Nate Bihldorff, a member of Nintendo of America, stated that the localization team pays special attention to single-line dialogues in The Legend of Zelda: Ocarina of Time that are extremely difficult to discover. Even if only a small number of players can trigger the relevant content, the team does not lower its priority.
The game hides some dialogue in special situations. Players may need to talk to a character at a specific time or obtain items in an unconventional order to see different responses from the characters.
These hidden texts provide feedback based on the player's specific actions and are part of what the localization work needs to address. Bihldorff's comments indicate that whether a line is easy to discover is not the sole criterion for the team to determine its importance.