Bite Size Languages
Bite size language was developed by the creator of the Actual Fluency Podcast. Each of the 5 languages consists of 100 lessons for beginners to develop their listening comprehension and pronunciation. You will learn grammar within the context of short dialogues and acquire relevant every-day vocabulary.
Each lesson seems doable within a 15-25 minute study session; they contain lesson notes, transcripts, translations, vocabulary, and a grammar section.
It seems like the dialogues speed up slightly as you advance through the lessons, but the final lessons do not reach a natural speed. This is understandable, however, as the program is aimed at beginners who have little or no exposure to the language (you can listen to some sound clips from various lessons here). You may be expected to repeat every lesson a few dozen times to get the most out of the course.
If you are studying Russian, the creator emphasizes that you don’t need to learn the Russian alphabet because the dialogues are the core of the lessons. But, all of the accompanying materials, including transcripts of the dialogues, are written in Russian.