What language was created in the early twentieth century?

It's impossible to give a definitive answer to this question without more context. There were several programming languages and natural languages created in the early twentieth century. Here are some examples:

Programming Languages:

* FORTRAN (1957): One of the earliest high-level programming languages, designed for scientific and engineering applications.

* COBOL (1959): A business-oriented language designed for handling large amounts of data.

* LISP (1958): A functional programming language influential in artificial intelligence.

* ALGOL (1958): A language that influenced many subsequent programming languages, including Pascal and C.

Natural Languages:

* Esperanto (1887): While technically created in the late 19th century, Esperanto gained significant popularity in the early 20th century as a planned auxiliary language.

* Interlingua (1951): A constructed language designed to be easily understood by speakers of various Romance languages.

To answer your question more accurately, please specify:

* What type of language are you interested in? (Programming, natural, constructed, etc.)

* What specific aspect of the language are you curious about? (Purpose, creator, influence, etc.)

Once you provide more context, I can give you a more specific answer.