I like to understand how to use the command {rndalt:object}
Can you please give me an example in using this command

If you have an objekt named test with a list of alternativ names (tab object, "Other names")
{rndalt:test} will display a randam name from this list

just to expand an explanation of Pertex' post:

every Object has a built-in 'alt' (alternative names) Stringlist Attribute, for holding multiple 'alias'-es ("names") for that Object:

https://docs.textadventures.co.uk/quest/attributes/alt.html

(hopefully you can find the 'alt' Stringlist Attribute in the GUI/Editor for Objects: one of an Object's Tabs, likely has the options, text-box or whatever, for inputting all the alternative names that you want for that Object, if it's a textbox, then usually the semicolon is used to separate values, example: behind;bottom;rear;etc)

(forgive the example, but couldn't think of anything else, less worse lol, with lots of alternative names for it, lol)

<object name="gluteus_maximus">

  <attr name="alias" type="string">butt</attr>

  <alt type="stringlist">
    <value>buttocks</value>
    <value>behind</value>
    <value>bottom</value>
    <value>tush</value>
    <value>fanny</value>
    <value>derriere</value>
    <value>rear</value>
    <value>rear end</value>
    <value>backside</value>
    <value>posterior</value>
    <value>rump</value>
  </alt>

</object>

so then when you use the text processor command of '{rndalt:NAME_OF_OBJECT}', it'll randomly pick one of those values in that Object's 'alt' Stringlist Attribute:

msg ("{rndalt:gluteus_maximum} is another name for your " + gluteus_maximus.name + " (" + gluteus_maximus.alias + ")")

example outputs:

bottom is another name for your gluteus_maximus (butt)
or
behind is another name for your gluteus_maximus (butt)
or
etc etc etc

That's a good example thanks hegemonkhan. I like your humour