Extracurricular-Foreign Languages

In the Extracurricular section of the Common App, you can choose “Foreign Language” as an activity.
I have been teaching myself Russian and Hindi for the past 2-3 years, and I wanted to put that onto the application. I am planning on majoring in Linguistics and Foreign Languages, so I thought that putting this on would help show my interest in this field.

However, is there anything I need to do to prove that I have been spending my time on this? There were not any standardized tests that I could take or really anything that I could do. On the application, I just put:
I am teaching myself ________

Is that okay? Does anyone know if I can make this better?

Thanks for your help

This is fabulous!
You could talk about your experience, why you chose those two, what interests you about them, what methods (comp, cd, books, friends) you use to learn, etc.
Cheers!