This might be an odd take coming from a column designed to instruct you on how to world-build, but I think there aren’t many reasons to construct a new language.
I know; it’s hard to believe. When we think about world-building, so many people think about the world of J. R. R. Tolkien’s Middle-earth; he is widely considered to be the father of world-building, as well as the father of conlangs (a constructed language specifically to be used in literature and other media). Tolkien’s Elvish languages are unique in that they have full grammatical completeness and act more like natural languages (a language that developed naturally, like Japanese or Hindi) than conlangs.
Although the Elvish languages of Middle-earth are some of the
