How to Remember Vocabulary When Learning a Language

Published 16 October 2026 · Updated 21 October 2026

You learn ten words on Monday. By Friday you can remember three of them. That is not you being bad at languages. Your memory drops things it decides you do not need, and a brand new word is near the top of that list.

You cannot really stop forgetting. What you can do is see a word again at the right moment, just before it goes, so it lasts a bit longer next time. That is the whole trick, and it is what this article is about.

Why words slip away

A long time ago a man called Hermann Ebbinghaus sat and tested his own memory on lists of made-up syllables, writing down how quickly he lost them. What he found gets drawn as the forgetting curve. You learn something, and your memory of it falls fast at first, then slows down. Most of what you lose, you lose in the first day or two.

New words start out a lot like those made-up syllables. They have nothing attached to them yet, no picture, no link to anything you already know, so they go quickly. The days right after you meet a word are the shakiest.

But something changes each time you manage to remember it. The word holds a little longer. Remember it a few times, with gaps in between, and it can stay for months.

What spaced repetition means

Spaced repetition has a clumsy name and a simple idea behind it. You go back to a word at wider and wider gaps: after a day, then a few days, then a week, then longer. You wait until you have nearly forgotten it, then bring it back.

The "nearly forgotten" bit is where the work happens. Looking again at a word you already know cold does nothing; it is too easy to count. Looking at one you have lost completely just means starting over. What you want is the moment where you have to dig for it and only just get there. That small effort is the signal to your brain that the word is worth hanging on to.

This is why cramming lets you down. Going over a list twenty times tonight feels great and you will have it tomorrow, but the timing is wrong, so it is mostly gone in a week. Ten minutes a day across a week will beat one long evening, for the same words.

How NerdLing does it for you

The annoying part of spaced repetition, if you try to run it yourself, is the admin. You would have to track every word, work out when each one is due, and not peek too early or leave it too late. Hardly anyone keeps that going.

So NerdLing runs it for you, in the background. When you learn something in a lesson it joins your review queue. Each day the words that are due come back for a quick look, spaced so they turn up about when you would start to lose them. Get one right and the next gap gets longer. Miss one and it comes back sooner. You do not plan anything or keep a list.

No cramming, and no pressure to empty the queue in one go. Reviews are a small, steady part of the day, and your progress is kept for good, so you can take a few days off and the words are still there when you come back. If you feel like more words on a subject you like, you can step off the main path onto a vocabulary branch, and what you pick up there goes into the same reviews.

For now there is one course ready to start, and more are on the way. The review works the same way whatever you learn: meet a word, and it comes back to you at the right moments until it sticks. If you want to feel how that works, you can start learning and let the reviews do the remembering.