Heinrich Schliemann , they say, trying to check the popular quotation of Napoleon - "A person speaking two languages ββ- costs two," learned several languages.
The technique is as follows:
a) It is necessary to read a lot out loud in a foreign language, this contributes to the development of correct intonation and listening comprehension of the language.
b) Exercises in translation, the purpose of which is grammatical rules, are not needed at all!
c) We need free essays on an interesting topic and fictional dialogues. The essay is checked by the tutor, the corrected essay is learned by heart in the evening, and the next day the teacher reads it so that he corrects mistakes in pronunciation.
Schliemann mastered English using this method in 3 months, and later learned several other languages ββin a similar way.