Translating a component inside a TranslatableComponent as an argument

[MerryDev]

Using this registry implementation and this properties file

team.red = <red>Team Red
mapsetup.stage.9.name.success = <grey>The spawnpoint of <arg:0> <grey>has <green>successfully<grey>been set.

Returns <grey>The spawnpoint of team.red <grey>has <green>successfully<grey>been set.

The code that sends the component to the player is

TranslatableComponent translatableComponent = Component.translatable("team.red");
Component component = Component.translatable("mapsetup.stage.9.name.success", translatableComponent);
player.sendMessage(component);

What I expect to get as an output is <grey>The spawnpoint of <red>Team Red <grey>has <green>successfully<grey>been set.

After debugging my code I realized that the argument is not treated as a TranslatableComponent although internally a implementation of it is used.