Ordering a query by terms' name

Hi,

I can’t seem to figure this out, so here I am.

I have a working query of a CPT, and everything works perfectly. This CPT has 2 taxonomies, and one of them is called “niveau” with the terms “A1, A2, B1, B2”.

I’d like the query to display the results according to the alphabetical order of those terms, and I cannot figure out how.

I tried to order both by meta value and meta numeric value, using “post_terms_niveau” as the key, but to no avail (the query shows no results when adding this parameter)

Any idea? Thanks!