I've been trying to localize default number formatting in Apache Superset charts, specifically the SI suffixes used in formats like .2s. Out of the box, Superset uses D3 defaults — k, M, B — but I need to show them in Russian: тыс., млн, млрд. What I’ve tried so far:

Changing Babel locale — partially localizes the interface, but does not affect number formatting.

Edited this file:

superset-frontend/node_modules/@superset-ui/core/src/number-format/factories/createD3NumberFormatter.ts

Injected a wrapper around .2s using .replace('k', ' тыс.'), etc.

Ran npm run build

Rebuilt with docker-compose -f docker-compose-non-dev.yml up -d --build

No effect in the UI, even on new charts

Tried registering a custom formatter in setupFormatters.ts:

getNumberFormatterRegistry().registerValue('RU_SHORT', d3Format('.2s'))

But Superset throws:
430227735890.2086 (Invalid format: RU_SHORT)

I also reviewed this article: Unfortunately, it doesn’t address SI suffix localization at all.

What I’m looking for:

Is there an official or stable way to override or localize SI suffixes in Superset?

Where is the correct hook — D3, @superset-ui/core, registry patching?

Has anyone successfully implemented localized short formats like .2s → 5 тыс., 20 млн, 8.3 млрд?

Any guidance, examples, or community experience would be appreciated