May I add that adopting SFL as a metalanguage is already a decolonising act, against the hegemonic universalist metalanguage of north American formal linguistics?
at the end of a conversation on SYSFLING begun by Jim Martin on 28 Jul 2019, 22:47:
… I would encourage the ISFLA executive to develop guidelines to the effect that in the absence of simultaneous interpreting English be used as a lingua franca for plenary addresses, that programs are clear about which language will be used for parallel presentations, and that where possible an English alternative be made available.