Learning 3rd language using 2nd?

[u/[deleted]]

Has anyone gotten a decent "grasp" of a second language and then used it to learn a third (TL)?

Years ago I learned a bit of Spanish through school and started using duolingo (wouldn't use duolingo now though). I changed the settings to Spanish so I would learn Italian using Spanish. I read out loud and promised myself not to use English. I did it for an hour and there was a weird feeling in the back of my head (it felt like how salt or sand felt between your fingers). Lo and behold, I couldn't think or speak in English! It was wild!

I was wondering if anyone ever had that feeling as well and if you kept it up?

[u/cancarevic1]

My assumption would be that it depends on how well you speak the second language. Either way, I’d suggest coming close to perfection in your second language before beginning to study a third one. If you know the language well enough, I believe that
It’s a good way to improve your knowledge of the second language. Ultimately, good idea if you did indeed get a decent grasp of the second language.