loco en:
  hello: "hello"
  users:
    zero: "no users"
    one: "{n} user"
    many: "{n} users"

For each declaration, a function of the same name is generated. For simple declarations, like hello, the function has no arguments. For complex declarations that depend on quantity, the function takes a single argument n: int.

Four tiers can be used in complex declarations: zero, one, few, and many. Whether you use all of them or just some, depends on the language. In Russian, all four are necessary. In English, few is not required. The tiers are utilized in pluralize templates for each language.

Tier translations are declared in strformat syntax: {n} is replaced with the number you pass to the generated function:

echo 0.users  # → "no users"