Adding a bilingual setting on MS OneNote

Question

OneNote is a fantastic tool for writing, if I could have only one application on my phone and laptop it would be OneNote, (or Poker Stars). There is one thing though that has been a true rock in my shoe for a while now, the fact that it only accepts one language at a time as the default app language, so when I write in my mother tongue, portuguese, it is seen as a misspelled word and the app underlies it with red every time, which is really annoying if one is writing long texts or essays.

The ability of bilingual writing is important to me, switching from english to portuguese gives me more room to express my thoughts and ideas, I would be really appreciated if OneNote could add a feature intended to allow bilingual users to have two default languages at the same time.