How to buy BTC as a company
Are there other options? Short answer: Yes.
Find a person with bitcoins and make an offer. That's how trading works.
Exchanges minimize the risk and centralize the trade. But they do not monopolize it.
English isn't the only option on most exchanges. If you can't find one supporting your language you have to translate, of course.
As Murch already pointed out legality depends on where you are from. So, check here to see if bitcoin is legal in your country. Plus I strongly recommend asking a lawyer for legal advice.