OP here.

This is funny. On the rest of my blog post I use indices. For this post, I went with indexes because that's what PG calls them in the docs.

I feel your pain.

There may be an odd semantic distinction that doesn't translate.

I (native US English speaker) typically interpret "indexes" as the plural of index as in "structure you use for fast key-value lookup". I interpret "indices" as the plural of index as in "lookup key".

Laughed out loud. We used "indexes" and "indices" all over a code base, methods/classes and doc. It was a real mess to true up to one.

American here, and I agree. But growing up, it was always indices.

Isn’t OED British? They recently took their dictionary behind a paywall (!!), but they recommend “indexes” while it appears accepted that it is the Americanized spelling nonetheless.

Ref https://en.m.wiktionary.org/wiki/indexes