The errors should be pretty straightforward to translate, but ideally each user of the lib shouldn't have to implement internationalization themselves.

Options:

• Translate error messages as they are collected. Requires passing in a translator to the validator itself.
• Translate error messages as they are created. The constraint class would need to have access to the translator
• Translate error messages afterwards. This is how I've personally done it. Requires 0 changes to the validator.