TALK OF THE TOWN: Memrise, a U.K.-based startup that uses machine learning for language lessons, has raised $15.5 million, TechCrunch reports. Octopus Ventures and Korelya Capital led the Series B round. Avalon Ventures and Balderton Capital, two existing investors, also took part. The company's CEO tells TechCrunch he wants to expand the AI platform, adding more features. He also wants to get a bigger office space.