hello-world-2 = Hello World 2 [en]
hello-world-3 = Hello World 3 [en]

message-2 = Message 2 Value [en]
    .attr1 = Message 2 Attribute [en]

message-3 =
    .attr1 = Message 3 Attribute [en]

message-4 = Hello, { $userName }. [en]