Site Settings: Missing options in Site language list

Expected behavior

It's expected that the language options shown under My Site → Site Settings in the app would match the language options shown when navigating to Settings → General in Calypso.

Note, the language options under Site Settings are currently only available to WordPress.com users within the app. More details on the distinction between the two available language settings for WordPress.com users (site vs. interface) can be found here: https://wordpress.com/support/language-settings

Actual behavior

The number of languages available under Site Settings is limited and does not match up with those available while logged into the web. This means that users are confined somewhat when setting up a site, even though their theme may be translated into a number of different languages.

Internal reference: p4a5px-2NN-p2

Steps to reproduce the behavior

• Navigate to My Site → Site Settings within the app. Note, you'll need to use a WordPress.com site.
• Select the Language setting to open the list of available languages.
• Notice that the list seems somewhat limited, especially if compared to what's available while logged into the web.

Tested on Pixel 6, Android 12, WPAndroid 19.5

Start by reproducing the language list through My Site → Site Settings in the Android app, using a WordPress.com site, and compare it with Settings → General in Calypso. The work is done when the app exposes the same available languages; verify the result on the reported Pixel 6 and Android 12 setup.