SCP Foundation

kilometer-high projection camouflage fence

A what? Like, an actual fence that high? Is that even possible? I'm pretty sure that the tallest building in the world isn't that tall, and that's a lot easier shape to work with than a perimeter fence. Maybe go with something more believable for concealment.

modern Latin

If it's a dead language, is it still called modern?

to x meters

Need a number there.

experimental gamma ray imaging (GRI) techniques

I feel like there would be real ways to actually figure that out.

I really like the imagery of a giant shifting pillar of glass in the middle of a big plain.

of otherwise non-anomalous

We don't know it's not anomalous, just that it doesn't move like the rest does.

pyramids; et cetera.

Should that be a comma?

the end in the lower mantle

I feel like the word 'situated' or something similar should be in there.

originally only broadcast a loop

Tense issue.

750 meters high

Should that not be 'meter'?

Don't really see the need for the crossed-out stuff, tbh.

face of SCP-XXXX for safety concerns

Don't really like the sound of that last bit there. Doesn't flow great.

are to be continually observed

'continually' feels a bit awkward here. I don't think you really need the word.

modern forms of Khoisan languages who are familiar with documentation on SCP-XXXX and SCP-XXXX-1

The last bit about knowing the SCP makes the sentence kind of long, and to me doesn't really feel necessary.

Any possible attempts at further communication on the part of SCP-XXXX-1

I feel like you could cut some of the words in this, in general.

if judged necessary, the O5 Command

I don't think that 'the' belongs in there.

single straight line radiating outward from the gravitational center of the Earth

could just say 'single radial line from the…'

state of motion of their own accord and

Why 'of their own accord'? What does that signify in this context?

externally by Foundation staff

Is it just by Foundation staff, or moreso a general thing?

of a silicon dioxide (SiO2; quartz), magnesium oxide (MgO; magnesia), and ferrous-ferric oxide (Fe3O4; magnetite) glass, otherwise known as obsidian

Not 100% sure you need to include this. It looks cool, but it doesn't really add anything to the article.

These perfect columns rapidly move up and down to

I don't think you need to say they're perfect.

up and down to produce patterns

You're kind of jumping into the pattern thing before you cover the movement thing, there.

Really digging the science stuff at the beginning of the collapsible.

to very ancient Khoisan

'very ancient' feels like a really weird way to put it, both tonally and just sort of in general.

by a phrase akin to

Don't really like the word 'akin' here, for some reason. Not sure why.

dialogue has been translated from the Khoisan-like dialect used by SCP-XXXX-1 and the Sandawe used by the researchers and spaces have been added

Reading this confused me. The ands kind of tripped me up.

SCP-XXXX-1 are far beyond that of even today's societies

Kind of a weird way to say this. It's obvious, but it should be stated in any case, but maybe in a way that makes it clear that everyone should know that this is obvious.

Due to said inconsistency, the origins of SCP-XXXX and SCP-XXXX-1 are put into further question.

You don't really need to say this.