Actually, there is. It is called language acquisition. It's not a tool, but a method. Trivially simple method, just require some basic material at the very beginning, say, first 3 months plus SRS like Anki. And a most importantly a will to practice every single day.
If you think about it, how well did you speak your native language at 4? How well at 7? Did you attend any classes to teach yourself? No, I assume not. So how come you are fluent?
Turns out, it is all about ingesting as much as possible. Even if you barely understand at the beginning. More of it - learning grammar is just a distraction. You can skim the book to have an overall grasp of it, but that's it. You weren't learning your native language grammar by the age of 7, did you?
The key is to ingest comprehensible input. If you can't understand the sentence, have a visual cues. Start simple by learning most frequent 1000 words (should take you 2-3 months max with Anki) and then you can easily switch to sentences. Just keep your senteces at the level that you understand almost everything but a word or two. One word ideally.
Read or watch only context you like, you are interested in and you have fun with. That's it. Do it long enough, every day, and you are set.
As an example, I've been learning Japanese in class for 2.5y and could not read nor speak as well as I'd like to. Not to mention I couldn't read kanji at all. Now after 9 months of trying language acquisition I can read children books (Winnie the Pooh) and comic books. If that's not a win, I don't know what is.
If you think about it, how well did you speak your native language at 4? How well at 7? Did you attend any classes to teach yourself? No, I assume not. So how come you are fluent?
Turns out, it is all about ingesting as much as possible. Even if you barely understand at the beginning. More of it - learning grammar is just a distraction. You can skim the book to have an overall grasp of it, but that's it. You weren't learning your native language grammar by the age of 7, did you?
The key is to ingest comprehensible input. If you can't understand the sentence, have a visual cues. Start simple by learning most frequent 1000 words (should take you 2-3 months max with Anki) and then you can easily switch to sentences. Just keep your senteces at the level that you understand almost everything but a word or two. One word ideally.
Read or watch only context you like, you are interested in and you have fun with. That's it. Do it long enough, every day, and you are set.
As an example, I've been learning Japanese in class for 2.5y and could not read nor speak as well as I'd like to. Not to mention I couldn't read kanji at all. Now after 9 months of trying language acquisition I can read children books (Winnie the Pooh) and comic books. If that's not a win, I don't know what is.