Well, I know a lot about promoting language courses with business clients in mind!
The answer to your question is: Yes, businesses would benefit!
That, however, is just the beginning.
1) Your content has to be professional and offer something most language course providers don't offer (USP).
2) You target groupd seems clear - companies wanting to do business with the Spanish-speaking world - but you need to identify those companies. You need to do research here and network. LinkedIn is an obvious choice, but you want to filter effectively. For that, try out LinkedIn navigator or other add-on services (which you must pay for). There are, of course, also groups there that could be relevant.
3) You need to get people to know who you are and what you are offering (that's obvious).
There are a number of course platforms - like udemy and Teachable - where you can test your course(s) and even make some money in the process.
You can also post videos that provide an example of your course.
Give me a call. I can share my experiences with you!