Here is a very useful website to help you learn almost every language in the world, including constructed ones.
Stay hungry, stay foolish.
— Steve JobsTranslate to any language and annotate with International Phonetic Alphabet (IPA)
Recognize and read text aloud, supports loop playback and speed adjustment
Play videos sentence by sentence based on SRT subtitle files to mimic native speaker pronunciation
Look up words and phrases with detailed definitions and examples
Start learning a new language from the alphabet
Language A to Language B, Language B to Language A, supports dictation
Sentence-by-sentence reading with word-by-word translation and alignment
Structured lessons with dialogue, articles, vocabulary, and exercises
Comprehensive grammar references for various languages