If someone is a native speaker of Khmer, is living in New Zealand and is learning Russian from a tutor speaking English, I'd know how to refer to Khmer (the "native language"), and how to refer to Russian (the target language). But what term would I use to refer to English in this scenario?
Should I use the term medium of instruction, or is that term more applicable to large-scale schools rather than one-on-one and class-based language learning?
I take it that medium of instruction includes the language of instruction. And that language of instructions is the language in which the target language is being taught.
(Unfortunately, I don't have a source for this but that's my sense from the literature I've read while researching and writing about language teaching)
I'm afraid there's no commonly accepted term for that.
Many schools use the following construct:
L2 for L1 speakers
For example (mind the URLs and titles as well):
So, in your case it would be Russian for English speakers, regardless the fact that the student's L1 is Khmer.
