The irreversible adoption of English as Europe's lingua franca raises at least four serious issues of linguistic justice: unequal language-based economic rents, unequal share in the burden of language learning, unequal capacity to influence, and unequal respect for the associated identities. In each case, the nature of the problem is spelt out and solutions are proposed, on the background of an analysis of the micro-mechanisms that underlie the dynamics of secondary language learning and multilingual interaction.