There are thousands people worldwide with high expertise level in Latin, definitely enough to ask/answer questions in Latin, who can't speak English. Anyone fluent in Latin (in writing/reading - no need for fluency in speaking) understands texts in English or Romance language to some extent, but they might have big problems with writing anything in English. They shouldn't be required to write anything more than their username and password (while logging in), but it doesn't necessarily mean we should advertise this website among them from the very start.
These people can be a boon for this site, but getting accustomed to their presence would take a lot of effort on our side. As basic communication in English may be a problem for them, so at least some of us need to learn at least basic StackExchange-related phrases in Latin. This would be especially a hard burden on moderators.
So, what are the guideline for inviting Latin experts not fluent in English?
- should we actively invite them, or just wait if someone of them finds us?
- which minimum level of English should be required (from at least basic understanding of the basic English in our [tour] to ability to at least broken English writing)?
- if we should invite them, when should we start? Right now, after launch of public beta, or after some longer grace period?