Jake Ireland

Count consider using [`Base.hidigit`](https://github.com/JuliaLang/julia/blob/6aaedecc447e3d8226d5027fb13d0c3cbfbfea2a/base/floatfuncs.jl#L196)? Maybe there are some other internal methods that could come in handy

Could also consider using something from [`Ryu`](https://github.com/JuliaLang/julia/blob/master/base/ryu/Ryu.jl#L121-L126)

This is a good idea! Do you want to make a PR or should I do this?

That would be good, thank you Andrés. Would it still be a keyword argument? I.e., would I be able to write ```julia spelled_out(123467, lang = :ru) ``` ? And would...

This actually might be more difficult than imagined. I just tried implementing it but they may not be valid unicode characters in Julia.