Every time I start on a new project I face the same dilemma: What language my domain model will be written in.
Generally I prefer English because it fits nicely into most programming languages, and foreigners will be able to understand it. I have done a lot of government law based applications, and sometimes English adds quite some complexity to the model. When there is no exact translation of the terms, you end up with a lot of nonsense of approximated terms or made-up words in the model and you need a great deal of commenting for anybody to understand it. Its not a domain model your domain experts understand.
Working with multiple languages is a pain, and I don't recommend it. I have seen lots of projects where the domain model was a mix , and it just adds complexity to the project.
I would very much like to hear your thoughts on this.. How do you handle developing for non English domains. At the moment I feel like going all the way and develop the domain model all in non English if needed.
On top of that I want to try out using letters like æøå in the domain model. The problem with this is that although the programming language supports it I can't count on all systems supporting it:(