Gaps in variable about jo HOT 2 CLOSED

You've misunderstood bash command line expansion. From the EXPANSION section of the bash man page:

Expansion is performed on the command line after it has been split into words. There are seven kinds of expansion performed: brace expansion, tilde expansion, parameter and variable expansion, command substitution, arithmetic expansion, word splitting, and pathname expansion.

The order of expansions is: brace expansion; tilde expansion, parameter and variable expansion, arithmetic expansion, and command substitution (done in a left-to-right fashion); word splitting; and pathname expansion.

Note that command substitution comes before word splitting. In fact, you left out some errors in your original output, that were a Big Red Flag waving you in this direction:

$ vod_id="1611180934340500000"
$ vod_title="…a jitra jsou zde tichá"
$ vod_title_original='The Dawns Here Are Quiet'

$ jo name="$vod_title_original"
{"name":"The Dawns Here Are Quiet"}

$ jo -p -n  -- -s id=$vod_id name="$vod_title" meta[alternativeName]=$(jo name="$vod_title_original")
Argument `Dawns' is neither k=v nor k@v
Argument `Here' is neither k=v nor k@v
Argument `Are' is neither k=v nor k@v
Argument `Quiet"}' is neither k=v nor k@v
{
   "id": "1611180934340500000",
   "name": "…a jitra jsou zde tichá",
   "meta": {
      "alternativeName": "{\"name\":\"The"
   }
}

You just need another pair of quotes, to protect your command substitution against word splitting:

$ jo -p -n  -- -s id=$vod_id name="$vod_title" meta[alternativeName]="$(jo name="$vod_title_original")"
{
   "id": "1611180934340500000",
   "name": "…a jitra jsou zde tichá",
   "meta": {
      "alternativeName": {
         "name": "The Dawns Here Are Quiet"
      }
   }
}

from jo.

Thx a lot.. helped 👍

from jo.