I had a chat with Danni and we would like to estimate the estimation first. 
- I need to look into the current state and what’s still missing (3h)
- Estimate the work on unfinished internationalisation (1h)
- Estimate the work on flexible Javascript translations (1h)
- Estimate UI changes to choose another language (1h)
- Research current ways for multi-language db models (2h)
- Estimate the integration of the top contenders (4h)
- Summarise the results in a nice document (2h)
That are 14h for the estimates which should give us a good understanding of what is to do and be detailed enough for a grant application. The research should also speed-up the development, because most questions have been asked already. That said, you never know where hurdles are hiding.