Multi-language narrations on Dynamic Tours

When enabling narration for a non-English language (e.g. Spanish or French), it becomes unintelligible. Especially for AI Script.
Is there any way to prevent this from happening? It seems that sometimes it recognises that it is another language and other times it does not. The words overlap and it is impossible to understand what is being said. 
If the system does not support multi-language feature, is there anything in the roadmap that could make this capability available in the short term?