Adding new languages with irregular verbs in them

The idea is quite simple, as this app offers the way of learning and practising irregular verbs in different languages it would be really nice to extend the number of them. To do that, ping me with a suggestion and we can discuss how we can make that work. I know that French has irregular verbs, but there should be more :)

The issue does not identify any files, tests, or entry points. First agree with the reporter on a target language and the required data and interface changes, then inspect the application structure to find where language content is defined and exercised; done means the agreed language can be learned and practiced correctly.

Written by the indexing model from the issue text.