When comparing Bliu Bliu vs Readlang, the Slant community recommends Readlang for most people. In the question“What are the best sites for learning foreign languages?” Readlang is ranked 4th while Bliu Bliu is ranked 14th. The most important reason people chose Readlang is:
You can read any content in your target language using the browser extension, and translate any words/sentences you don't know quickly.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Gives you real-world practice
Rather than simply expecting you to remember vocabulary, Bliu Bliu gives you practice reading real content in your target language.
Pro Unique way of adjusting lessons to your level
You can tell Bliu Bliu which words you are comfortable with and which you aren't by rating them as "easy" or "hard".
The site keeps track of these and gives you pieces of writing that use a good ratio of words you know and words you don't.
The more familiar you get with the language, the more difficult the reading becomes.
Pro Translates native content quickly
You can read any content in your target language using the browser extension, and translate any words/sentences you don't know quickly.
Pro Creates flashcards from words you don't know
Readlang takes the words you translate most often and turns them into flashcards for you to practice.
Pro You can import long texts, including whole books
This is impossible or very annoying with other similar services.
Cons
Con Not all translations are accurate
Each word is translated individually by google, which only displays one definition. If a word has more than one use, it may show you the definition of the incorrect word.
Con No way to interact in case of questions
If you happen to have a question, you are out of luck. The only resource for you is to resort to Google.
Con Not a great starting place for complete beginners
The site will test your knowledge of your target language after signing up. If it finds you are just starting out, it will suggest you come back after you know a bit more vocabulary.
Bliu Bliu throws you right in by giving you things to read in your target language, rather than giving you structured lessons.
Con Not a good way to learn a language by itself
It's not your standard learning website with structured courses. Instead, it helps you get more familiar with your target language by translating content when needed.
This can be really beneficial for someone trying to improve their fluency, but isn't going to directly teach you grammar. Readlang is better used to supplement your learning while learning from structured courses.