Shannon Sauro talks about how effective fandom can be for learning foreign languages and gaining efficiency in a given language. They talk about RPG blogs here:
In such fan-based RPGs, individual players are responsible for the creation and maintenance of a specific character’s blog, including posting biographical information about the character (not the player), assuming the voice, viewpoints and linguistic style of the character in blog entries, and locating or creating icons that reflect the personality and appearance of the character.Sauro, Shannon 2014.’ Lessons from the fandom. Technology-mediated tasks for language learning’. Technology-mediated TBLT. Researchnig Technology and Tasks. 247.