What "fast" actually means
Nobody learns a language quickly by studying harder. The people who get there faster are mostly doing the same hours as everyone else, spent differently. Seven things below have decent evidence behind them, and all seven work by changing how the material gets encoded rather than how much of it you sit through.
European Portuguese adds a wrinkle. Its rhythm and its vowel reduction mean you can read fluently and still not recognise a single spoken sentence, so anything that skips the sound of the language will strand you.
1. Spaced repetition
Ebbinghaus put a number on the problem in the 1880s: without review, roughly 70% of new material is gone inside a day. Spaced repetition works by showing you a word just before you would have lost it, which is both the cheapest and the least enjoyable way to hold onto vocabulary.
See telemóvel after ten minutes, then a day, then four days, then a fortnight, and it stops being something you look up. Worth pointing the reviews at the boring words rather than the interesting ones. Pois, então, and the contractions do, na, à do more work in a sentence than any noun you will meet this week.
| Review Interval | Cognitive State | Memory Strength |
|---|---|---|
| 10 Minutes | Initial Encoding | Low (Short-term) |
| 24 Hours | Consolidation Phase | Moderate |
| 1 Week | Retrieval Practice | High |
| 1 Month | Permanent Storage | Very High |
2. Shadowing
Play native audio and repeat it almost on top of the speaker, a fifth of a second behind. It is tiring and it looks ridiculous, and it does something no amount of reading will: it leaves no room for you to translate first.
For Portugal specifically, this is the fix for the rhythm problem. Learn a language off the page and your mouth will give every syllable equal weight, because that is what the spelling implies. Shadowing forces the compression instead: unstressed vowels flattened or dropped, stressed ones hit hard.
Take "Eu gostava de pedir um café, se faz favor." Do not pronounce it as written. What comes out of a Lisbon speaker is closer to "Eu g'stava d'p'dir um café, s'fash fav'r." Copy that, not the spelling.
3. Input you can nearly understand
Krashen's argument, and it has held up: you acquire language from material pitched just past what you can already handle. He called it i+1.
A political debate at your level is noise, and noise teaches nothing. "The cat is on the mat" teaches nothing either, for the opposite reason. The zone you want is around 80% understood, where context can carry the missing fifth. Guessing a word from the sentence around it plants it more firmly than looking it up ever does, which is annoying if you like dictionaries.