Like what you're doing here, and kudos for looking at it.
Not sure it stacks up though - if it was a code then yeah, it would make total sense, but how could an alien race that's been dead for several million years be encoding our English names for systems?
IMHO the situation is much more complex - the triangular patterns are the Guardian's written language (glyphs).
From the lore the glyphs have the history of the writing system embedded in them.
There's 3 versions at the sites:
- On the obelisks (most complex - 6 grids of small triangles)
- On the relic (intermediate complexity - 2 grids of small triangles)
- On the base of the relic towers (least complex - 1 grid with 1 large triangles and 8 small triangles)
The roots of it are in a sign language used for silent communication when hunting. Guardians had 8 digits in total, so I suspect that's what the small triangles reflect in the least complex version.
The 1 large triangle & 8 small triangles system obviously quickly hits limitations in the number of concepts it can encode, and I suspect that then as the language developed the large triangle was replaced with small triangles (dramatically increasing the number of concepts which can be encoded in a single grid) and then further grids were added.
So in summary I think we're looking at translating a language rather than breaking a code.