Learning a new language is a noble hobby that you can do. A hobby is an activity or interest done regularly for pleasure. It is typically carried out during spare or pleasure times. Leaning a new language can be done not as a hobby but also as a necessity. When traveling to a country that speaks a different language for the purposes of work or for an activity that will see you in that country for a long time, the best thing you can do is learn the language that is spoken there.
The learning of the language eases the communication and avoids the use of sign language which admittedly, can be hard to decipher. Learning a new language is an enjoyable activity since the learner also studies the culture and traditions of the people who speak that language. The student also has an advantage in terms of job prospects. A much wider prospect of jobs opens up to the learner. It is most advisable to learn a new language either as a hobby or as a necessity.