Are there reference books or online material for reading mathematics out loud in different languages? For example, the expression1) $$ \int x^2dx=\frac13x^3 $$ is understandable to anyone who has studied mathematics, independently of their language skills. But reading it out loud or writing it in words only is highly nontrivial for someone without mathematical education in the respective language. I can express the equation above in English2) or Finnish3), but not in any other language I speak. I find students occasionally having trouble verbalizing formulas even in their mother tongue in which the courses are taught.
For a complicated formula there need not exist any sensible way of reading it out loud; one has to explain it in some other way than reading through. There rarely is a single correct verbalization of a mathematical expression. Therefore I don't expect a "complete and perfect set of rules", but just some guidelines and examples in different areas of mathematics.
Main question(s): Where can I or my students learn to pronounce mathematics in different languages? What material for reading mathematics out loud do you suggest? Can I find examples of mathematics spelled out in different languages? Resources for all languages4) are welcome.
Side questions: Are there sources about reading mathematics out loud (or spelling it out) in general? Is there any research on how reading formulas aloud affects learning mathematics?
1) I don't want to discuss if this is good notation or whether I should have a constant.
2) "The integral of x squared equals one third x to the third."
3) "x:n neliön integraali on yksi kolmasosa x kolmanteen."
4) I don't speak all languages, but I think it would be useful to collect a list of mathematics pronunciation guides in one place. My personal interest is mainly in Latin, Finnish, English, Italian, French and Swedish.