Publisher: Wikibooks 2011
Congratulations on your decision to start learning Hangeul, the Korean script! You will see that being able to read Korean will baffle your friends and enrich your life. Also, you will no longer be completely illiterate when travelling to Korea.
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Chinese is the most common language in the world: about one-fifth of the world speaks it as its native language. This textbook will assume that you have no prior knowledge of Chinese, but are willing to take Chinese as a serious subject of study.
by Robert Horning, at al. - Wikibooks
A basic introduction for 8-12 years old kids to learn about different languages around the world. The text covers a large variety of languages rather than studying any particular language in depth. The goal is to provide some basic language skills.
by Francois Gouin - G. Philip & Son
This work is primarily an investigation into the psychological laws underlying the universal act of learning the mother-tongue by the little child, and, springing therefrom, the exposition of an artificial system of teaching foreign languages.
by George Cox - ManyBooks
This textbook is an early compilation of the works so far on Esperanto, with a look at and commentaries to the alphabet and grammar of the language. The International Auxiliary Language Esperanto: Grammar and Commentary was first publishrd in 1939.