Busuu.com, the language learning community, has raised an Angel round from FON-founder and serial entrepreneur Martin Varsavsky. The Madrid-based startup is remaining mum about the size of the investment, however, but says that to-date Busuu has received less than €1m in funding. That's a figure dwarfed by its main competitors. US-based Livemocha has raised $14m, while European rival Babbel has raised over €1m.