Latvian language missing from iPhone's language setting

Hi everyone,

I noticed something odd in Settings → General → Language & Region → Add Language on iPhone: Estonian and Lithuanian appear as selectable system languages, but Latvian does not. That seems inconsistent for the Baltic languages, and I’m trying to understand whether I’m overlooking a setting or if Latvian simply isn’t supported yet as a full UI language.

[Re-Titled by Moderator]

Original Title: Don't know why Latvian Language is missing? No one is interested, lazy or just forget about it?