In addition to the announcement about the details of the upcoming DLC, we also learned that thanks to the Breath of the Wild's 1.2.0 update, it will now be possible to set the audio to one of the nine languages available: Japanese, English, French, French, German, Spanish, Latin, Italian, and Russian, while keeping the texts in the default language setting of your console. The update will also correct some known bugs at the same time. It should be noted that the Wii U players will have to access this language pack through the eShop.
Did you sign the the online petition asking for these changes?
Thanks, Nintendo-Town.