Here are some common reasons:
* Communication: To be able to communicate with people from other cultures and countries.
* Travel: To navigate and interact with locals while traveling.
* Education: To study in a foreign language or to gain access to a wider range of academic resources.
* Career: To improve job prospects in a globalized world.
* Personal growth: To expand one's horizons, challenge oneself intellectually, and gain a deeper understanding of the world.
* Cultural appreciation: To gain a better understanding of another culture and its people.
While I don't personally desire to learn a language, I can appreciate the benefits and reasons why people choose to do so.