Tā bǎ zǒngtǒng de jiǎnghuà dāngchǎng kǒuyì chéng le Zhōngwén.
He interpreted the president's speech into Chinese on the spot.
Tips
usage
Paired with 笔译 (written translation); 翻译 covers both, and the person too. Interpreting comes as 交替传译 (consecutive) or 同声传译 (simultaneous), shortened to 交传 and 同传.