Implement plural variant support #1
Description
The instructions in the README are great for learning how to inject translations, but they are completely missing any instruction about how to make use of a key once injected.
It's especially important to instruct on how to insert data into dynamic segments within the translation string. For example, how would one convert this string interpolation to a translation string and how would they then use the string at runtime with dynamic value replacement? $"A starter {locoName} has been delivered outside the player home."