We are having some issues with creating users in Sinhala Wikipedia. We are not allowed to create user names like "සසීන්ද්ර" and "නන්දිමිත්ර".
This looks like something to do with modifiers on Sinhala letters. May be zero width joiner (ZWJ) need to be allowed?
rakaranshaya (්ර) is written as: hal kereema + zero width joiner(ZWJ) + ra
Thanks in advance,