Help for setting the regional number format

[joaquinniicolas]

Hi everyone,
I'm trying to use regional number formatting, but I'm getting an error.

The following documentation (https://docs.univer.ai/guides/sheets/features/core/numfmt#facade-api) says that I can use locales for number formatting and even shows an example using en_US. However, when I try to use it myself, it doesn’t work — I only see options like 'en', 'es', etc.

How can I fix this?

Documentation screenshot: