• Bottom line: Chances are you’ll have to watch this more than once to build your vocabulary, but you’ll be entertained.

Learn a Language (LearnaLanguage.com): Users choose a language (Japanese), then a category (“Japanese Words”), followed by a topic (“Travel”). Next, they decide whether to play an educational game or click through talking flash cards. There’s one word on each card, which can be flipped over with a click. For example, a card with “suutsukesu” on one side says “suitcase” on the other.

• Bottom line: The website is not as comprehensive as others, but it enables users to study key words and phrases without having to make their own flash cards.

Living Language (LivingLanguage.com; click on “free downloads”): While this company primarily sells language products (about $20 to $180), it also offers freebies like pocket phrase guides and an “in-flight” series to help “learn before you land.”

• Bottom line: Living Language is not a free site, but the guides are a nice perk for those who can only afford to dip a toe.

Livemocha (Livemocha.com): This networking site allows members to find language partners around the world, and it offers basic instruction in grammar, vocabulary and conversation (users need a microphone). There is a fee for unlimited access ($9.95 for one month; $99.95 for a year).

• Bottom line: While the videos sometimes load easily and sometimes don’t, it helps facilitate learning by talking — a big plus.

IF YOUR POCKETS ARE DEEP

Pimsleur Approach (PimsleurApproach.com): This audio-only program, based on the language retention theories of the linguist Paul Pimsleur, has been used by the FBI. The company claims that students who use the CDs for 30 minutes a day will begin speaking the language in just 10 days — no textbooks required. The idea is that adults learn language the same way children do: by hearing it in everyday situations (the CDs focus on about 2,500 core words and phrases). The program begins with a 30-day trial of Quick & Simple, eight lessons for $9.95. Then, every 60 days, users receive in the mail a higher-level course with 30 lessons, which they can keep (for $256) or return within 30 days at no cost plus shipping. Progress to the most advanced courses, and the entire system can end up costing upward of $750, depending on the language.

• Bottom line: This approach can be as expensive as a plane ticket, but if you want to learn fast, naturally and on the go, it just might be a match.

Rosetta Stone (RosettaStone.com): You’ve probably seen the kiosks for this interactive software in malls or airports. It is available in 30 languages ($159 to $499) and has been used by government agencies. Students are not bogged down with translation and grammar. Instead, the emphasis is on “dynamic immersion” — connecting words with images to glean meaning. (Those who buy Version 4 can reinforce lessons with mobile apps.)

• Bottom line: Rosetta Stone is much more intensive than a vacation primer. But if you want to keep learning long after your trip, it’s a far better investment than a souvenir snow globe.

Transparent Language (Transparent.com): “Our methodology was originally developed in some of our work for the Department of Defense,” said Chuck McGonagle, the senior vice president and general manager of Transparent Language. “It was all focused on building your vocabulary.” And the company’s primary product, Transparent Language Online ($149.95 for six-month access; $199.95 for a year), does just that. Users begin with the Essentials Course: lessons organized around everyday situations like greetings, shopping, checking into a hotel. For those short on time, there’s the Byki Quick Start course, or the free Byki Express program at Byki.com.

• Bottom line: This is one of the most affordable big-name systems, and it enables users to practice anywhere they have Internet access.