Learn Online English Speaking

I know this has probably been asked a million times. Is there any answer as to how many languages a person can learn and be able to retain them 100% for their lifetime?

i want to learn languages and do freelance translation what is your advice?

What do people actually mean when they say they can't speak?

What are your biggest weaknesses and what do you do to get better at them?

Anki for learning vocabulary?

People that learn/-ed multiple languages at once, what are methods?

Any recommendations for mobile services that supplement language learning?

Quali sono gli esercizi più utili quando si studia la lingua italiana?

Looking for Ewe deck / Anki deck

Listening vs comprehensible input

Yes, Duolingo can be a helpful tool. Here are my suggestions:

GCSE languages pupils to stop asking ‘ou est la piscine?’

Apps for keeping memory refreshed?