Comment by _ZeD_

.NET ResX localization generates a source file. So localized messages are just `Resources.TheKey` - a named property like anything else in the language. It also catches key renaming bugs because the code will fail to compile if you remove/rename a key without updating users.

... Just about anything else? The baseline expectation in other data formats is that keys are case-sensitive. (Also, that there are keys, specifically designed for lookup of the needed data, rather than tag names.)