Harvestella is available in the following languages:

Japanese: Voice Over, Subtitles & User Interface
English: Voice Over, Subtitles & User Interface
French: Subtitles & User Interface
German: Subtitles & User Interface
Spanish: Subtitles & User Interface
Korean: Subtitles & User Interface
Chinese (Simplified): Subtitles & User Interface
Chinese (Traditional): Subtitles & User Interface

The language can be changed through the "Change Language" option in the title screen.