I only know my native language for a little worthless country with less population than many US *cities*, so that "skill" really is worthless.
Does one have to know Chinese/Indi to make a Chiese/Indian Web site? These markets are growing, and maybe I would stand a chance there if only I knew the languages.
Is there any point in trying to learn these langugaes? Or will the fight be over when I finally learn them? I don't trust anyone so I couldn't pay somebody to translate... I would not trust them to use correct grammar or to even translate properly and exactly what I want to express.
If you think you could learn Chinese and translate things more accurately than a native Chinese person; and you think this is going to take you more than a few years... you're either amazingly gifted or overestimating your capabilities.
Take a minimum wage for where you live, multiply it by thousands of hours of study, add in text books and tuition. Now, spend that much on getting someone to do good translation - pay them well and make sure they are a native of the country and have a good level of education.
Learning a different language, and then trying to make out of money, is I think quite a very long journey. The most difficult part here could be learning the language, but the part which will really matter at the end is what you provide to the visitors of your website.
You do have the greatest asset at hand - the English language.
Though I do want to learn Chinese, like many others, I think I am not going to pay the price for it yet, and certainly my main source of income won't revolve around that language.