Which functionality are you referring to? Wolfram Alpha integration, free linguistic input, the help-documentation? I'm pretty sure Wolfram does not advertise with other languages, other than code-captions for a select number of languages.
It is not that easy as you describe it, just having a dictionary and translations is not nearly enough. You really have to implement this case by case and it is a lot of work as each language just works very differently... Ok there are similarities between e.g. Spanish and Portuguese, and Dutch and German, but also many many exceptions....