Simply Fluent
The Number Is Higher Than Most People Expect
You've been learning French for a year. You feel good about your progress. You can order coffee, describe your weekend, and understand the gist of a news headline. Then someone casually mentions that you need to know around 8,000 to 9,000 word families to comfortably read a novel without help.
Eight thousand. Your vocabulary app tells you you've learned 1,200 words. Your heart sinks.
If this sounds like your experience, take a breath. Yes, the research gives us some big numbers, but the full picture is far more encouraging than that first gut reaction suggests. The question isn't only "how many words do I need?" It's also "how do I get there without losing my mind?"
What the Research Says
The Short Answer: Fewer Than You Think
The best-known figure comes from Paul Nation. In a 2006 study of five English novels, he calculated that you need 8,000 to 9,000 word families to know 98% of the words, which is one unknown word in 50. An earlier study by Hu and Nation (2000) had estimated that learners need about 98% coverage to understand a fiction text without help. But "without help" is the key phrase. Nobody said you have to read without help.
With a tool that gives you instant translations, you can start reading with the vocabulary you have right now. If you already speak a related language, that can be very little: when I started Portuguese, I started from nothing but my Spanish, and I could recognize a lot through it: similar words, similar grammar, similar sentence structure.
That's the real answer to "how many words do I need?" You need enough to follow along with support. For Portuguese, coming from Spanish, I needed almost nothing. For Spanish, I learned my first few hundred words before I opened a book. A language far from anything you know will take more. Waiting until you feel "ready" doesn't build your vocabulary. Reading does.
Early reading can look something like this: you can follow the story, you know who is doing what and why, but sometimes a paragraph has a few words you don't know and you lose the emotional tone. You can tell someone is upset, but you can't tell if they're disappointed or furious.
That's what early reading feels like. There are gaps, but they don't stop you, and you can look up whatever you need to fill them.
Why These Numbers Aren't as Scary as They Sound
You Already Know More Than You Think
If your target language shares roots with a language you already speak, you have a massive head start. English and Spanish share a lot of cognates, words like "information/información," "decision/decisión," and "important/importante." English also borrowed a large part of its vocabulary from French. German and Dutch share a lot too. Speakers of one Romance language can often read a good deal of another.
For an English speaker learning Spanish, many words are recognizable from the start. If you already speak a Romance language, the overlap is even larger. You might be able to start reading in a related language much sooner than you expect.
Vocabulary Growth Accelerates With Reading
Here's the paradox: reading is both the goal and one of the best paths to it. Research on extensive reading, reading a lot of material at or slightly above your level, has found that it builds vocabulary. A single book teaches fewer new words than you'd hope: in a study by Waring and Takaki (2003), learners who read a graded reader remembered the meaning of only about 1 of 25 new words three months later. Those words had no translations next to them, which is one reason I think it's worth having them. The gains come from reading a lot. Nation (2014) estimates that meeting the words in the ninth thousand most common word families at least 12 times takes about 3 million words of reading, around 25 novels.
Why does volume work? Because in natural text, high-frequency words appear constantly, giving you repeated exposure. And when you meet a new word surrounded by words you already know, you can often work out the meaning from context. Learning words this way, as a side effect of reading rather than by studying them, is what researchers call incidental vocabulary learning.
The start of a book is often the hardest part, because the names, places and the author's favourite words are all new. The further in you get, the more often the words that confused you at the beginning have come back, and some of them you now know without having studied them.
The more you read, the more words you meet again, the more your vocabulary grows, and the easier reading becomes. It's a cycle that works in your favor.
You Don't Have to Read Alone
This is the crucial point. With a reading tool that translates in place, you don't need to hit any threshold before you start. That's why I built Simply Fluent: you select an unfamiliar word and get the translation that fits the sentence, without flipping to a dictionary or losing your place. And a translation you save is shown above that word in every book you read after that.
The real threshold for starting to read? Whatever you know right now, plus a good tool.
How Vocabulary Grows in Stages
Phase 1: The Foundation (0-1,000 Word Families)
At this stage, you're building the essential scaffolding. Focus on the highest-frequency words: the articles, prepositions, pronouns, and basic verbs that make up the structural backbone of any language. These words appear so often that they cover a large share of any text: in Lady Chatterley's Lover, the novel Nation (2006) analysed in most detail, the first 1,000 word families cover about 81% of the words.
At this stage, graded readers, short stories and simple texts are the easiest place to start, and with translation support you can try books written for native speakers earlier than you'd think. The key is getting comfortable with the rhythm of reading in your target language, even if you're relying heavily on translations.
Phase 2: Reading Gets Easier (1,000-3,000 Word Families)
This is where reading starts to feel rewarding. You can often guess meanings from context, and you're picking up new vocabulary through exposure.
It's still a lot of new words. With 2,000 word families you know about 88% of the words in a typical novel (Nation 2006), so roughly one word in eight is unfamiliar. On your own that's hard going. With translations one press away, and the words you've saved shown above them, you can follow the story and meet a lot of new vocabulary on every page. As you read faster, you read more, which means you learn more words. It just builds on itself.
Phase 3: Steady Growth Through Reading (3,000-8,000 Word Families)
This phase takes the longest, but it's also the most enjoyable because you're reading books, articles, and stories that you've chosen because they interest you. Your vocabulary grows steadily through sheer volume of reading, supplemented by the words you choose to save and study.
The key insight for this phase: don't try to rush it. The words you need will come to you through the books you read. A mystery novel will teach you one set of vocabulary. A romance will teach you another. A news article yet another. Over time, the coverage adds up.
Phase 4: Reading Without Help (8,000+ Word Families)
This is the range where, by Nation's estimate, you can read a novel without help. You still meet unknown words, about one in 50, which is a few on every page, but few enough that they don't stop you.
For me with Portuguese, after about eight months of reading every day, I walked into a library, picked a book off the shelf and read it, with no app and no help. At some point you stop counting word families. You just read. Sometimes you see an unfamiliar word and look it up, sometimes you don't.
Practical Steps to Start Reading Sooner
1. Stop Waiting Until You're "Ready"
Don't treat reading as something you do after you've learned enough vocabulary. I think that's backwards. Reading is how you learn vocabulary. Start now, with appropriate support.
2. Choose Your First Book Wisely
Pick something short, something in a genre you enjoy, and ideally something you've already read in your native language. Knowing the general plot frees up mental energy for processing the language itself.
3. Look Up Words Without Leaving the Page
The difference between "looking up every word in a dictionary" and "selecting a word for an instant translation" is the difference between a frustrating slog and an enjoyable reading session. Use a tool that keeps you in the text while making unfamiliar words easy to look up.
4. Read a Lot, Not Just Carefully
Volume matters more than precision at most stages. Meeting the less common words often enough to learn them takes millions of words of reading, so pages count. A page where you know about 90% of the words is hard going on your own: in Hu and Nation's 2000 study, only 4 of 16 readers understood a story adequately at that level. With a translation one press away it's workable, and it's full of new words. Look up whatever you want, but don't stop to study every word. Keep reading and trust that repeated exposure will fill in the gaps.
5. Count Pages, Not Words
Stop counting your vocabulary and stressing about the numbers. Count pages instead. The words come with them.
The Number Is Big, and That's Fine
Yes, 8,000-9,000 word families is a lot. But you don't need all of them to start reading, you don't need to learn them all from flashcards, and the journey of getting there is itself one of the most rewarding parts of learning a language.
Every book you read adds to your vocabulary. Every page makes the next page easier. The number isn't a wall. It's a path, and you're already on it.
So don't let the research intimidate you. Let it inform you. Know that you can start reading books right now with the right support. Know that reading those books is one of the best ways to build your vocabulary. And know that somewhere along the way, you'll stop counting and start just enjoying the story.
That's the goal, after all. Not a number on a screen, but a book in your hands that you're reading because you want to.
