If you don't know, Esperanto is a constructed language designed by a Polish man in the 19th century for international communication.

如果你不知道，世界语是19世纪一位波兰人为国际交流而设计的人工语言。

Analyzing spoken or written communication in its various forms is a key aspect. Discourse analysis within applied linguistics investigates how language constructs meaning and represents social realities.

分析各种形式的口头或书面交流是一个关键方面。应用语言学中的话语分析研究语言如何构建意义并代表社会现实。