I had a friend that learned 6 langauges.
Unfortuantly he is no longer with us, However
Before he died I asked him his secret on how he was able learn so many langauges.
And he told me "By practing on internet chat sites."
Go to something like mirc and try it out. Worked good for him.
He knew German, English, Portuguess, Spanish, Esperanto, French.