<p>I myself is a multilingual in Mandarin, English, Portuguese and Spanish with Cantonese as my first language.</p>
<p>There is no such thing as regretting to know more or wasting time learning, you will only knowing less. </p>
<p>When it comes to learning a language, you should try to analysis which language gives you the opportunity to practice with a fluent-non native or native speaker. </p>
<p>Since we are living in the US, the most popular second language among American is Spanish, many jobs in America will require it employees to speak both english and spanish well, and business that chose not to serve a particular group of people will only lose business and will have a worsening relationship with them.</p>
<p>The chinese always said, “it does not matter whether what the buyer understand what the seller wants but a seller must understand the buyers, this way he can foster a positive relationship.”</p>
<p>Think about this, for example, one day, a chinese customer came to your place to buy a product and you speak his language and understand him and his culture from the inside and out. If i am that chinese person, I will definitely spread the news and recommend my friends and every chinese people i know to come and look for you to serve all of us. They will be so happy with your service that they are willing to give you more money because they like you more. Does that make sense ?</p>
<p>Ok, enough of this talk, the next most useful language will be Mandarin and Arabic. Japanese is good if you want to work mostly in Japan and Russian if you want to have a mail order bride :P.</p>
<p>From my experience, learning mandarin can set you on the path to learn other East Asian language Vietnamese, Cantonese, Japanese and even Korean, because Asian Language developed base on Han Chinese Character as China is always the centre of power in Asia. The only tough part about chinese is pronunciation, this can go away, once you know how to grasp the tone and stuff, the word order is quite similar to English and have no conjugation and verb, there is no alphabet to be learnt, so you can totally skip the alphabet stuff and go straight to memorizing chinese vocabulary and character. </p>
<p>So overall it is very easy to learn and not as difficult as many people make it out to be. Because these people have never bother to learn and understand Chinese.</p>
<p>My friend learn Korean and Japanese, so word order in japanese and korean are similar to each other but different from english. Sure, it is easy to pronounce but the grammar may not make sense to you and they do have an alphabet system and such.</p>
<p>So my best advice to you when it comes to learning a new langauge is this, learn to write first and learn one word a day, this way you will learn a lot faster. Do not worry about speaking and listening yet because you are not living in a country that is surrounding by native speaker of that particular langauge all the time. You still need someone to teach you how to speak and if you already know how to write by the time, you find someone to teach you how to speak, you pretty keep the whole process of learning the basic which can save you a lot of time and trouble</p>
<p>Get to know more native speaker of that langauge through skype and internet and try write to them in that language whenever you get the chance. </p>
<p>Do not sit there and think about it, just do it. I hope my advice can help.</p>