Language exchange

An old idea with a name: tandem

Language exchange is not new. After France and Germany signed the Élysée Treaty in 1963, the Franco-German Youth Office it created began bringing young French and German people together in their tens of thousands - and out of those meetings grew a method teachers came to call tandem learning: two people who each speak the language the other is learning, helping each other in turns. By the 1990s, with the Tandem Network set up by European universities, the method had moved online. A 1996 guide edited by David Little and Helmut Brammerts boiled it down to two principles, and they are still the whole secret.

Everything else is detail. Exchanges fail for one of two reasons: one person takes more than they give, or one person expects to be taught. Keep both rules in mind and almost any partner becomes a good one.

A script for your first exchange

Random matching means you will not always find someone learning your language. When you do, a little structure makes it work. Here is a simple shape, shown for an English speaker learning Spanish:

If your match is not learning your language, that is still a conversation in theirs - and it is fine to say "I'm learning Spanish, could we speak slowly?" Many people will happily help for a few minutes. If it is not working, thank them and tap Next; they joined for their own reasons too.

How to correct, and be corrected, well

• Correct sparingly. Fix mistakes that change the meaning, or that your partner keeps repeating. Ignore the rest; a conversation is not a test.
• Recast instead of interrupting. Repeat the sentence back correctly - "Oh, you went to the beach yesterday?" - and keep going. It teaches without stopping the flow.
• Slow down, don't simplify into baby talk. Speak a little more slowly and clearly, but keep normal grammar and vocabulary. That is what your partner is trying to learn.
• Let silences run. Your partner is building a sentence. Wait a little longer than feels natural before you help.
• Write down one thing. After each swap, note one phrase you want to reuse. Twenty calls later, that is a notebook full of real language.

Keep good partners: add each other as friends and you can set up regular exchanges - the same partner every week is worth far more than twenty random ones. Keep the usual care, too: no surname, address, workplace or social accounts in a first conversation, and Report or Block anyone who makes it uncomfortable. For English specifically, see practice English speaking; for the long view on why speaking is hard, the Journal's why you understand more than you can say.