Hello Stef,
Lots of options out there.
1. You could start your own continuing education company, apply to the AACN and other associations for CEU provider approval (it sounds like you may have done this already).
2. You could partner with a company that is already providing continuing education and offer your courses and share a portion of the revenue that comes in. This would take advantage of their established hospital client base and save you the marketing/credentialling process.
3. You could start developing your lessons, teaching manuals into an HTML format. Start a membership site where for a fee, hospital staff or consumers could access your lessons online for a fee. Maybe offer the "beginner" materials for free and as people look for more advanced topics, offer the "subscription only" materials.
4. From your website which would already offer free "teaser" material, offer hard or electronic copies of your lessons that can be purchased either in book (hard) or electronic formats.
5. Place ads on Pay Per Click search engines,
http://www.payperclicksearchengines.com under medical spanish related terms. That way, when people go looking for translators, interpretors, medical spanish courses, your website would come up.
6. Contact other nurses doing what you're doing, ask if you can do some kind of cooperative agreement that would be mutually beneficial.
Off the top of my head, the following nurses come to mind.
Linda B. Jenkins RN BSN PHN ACCE, California Nurse Entrepreneurs:
Specialty Areas: Childbirth, Labor Videos in Spanish, Medical Surgical, Obstetrics OB, Prenatal
http://www.nursingentrepreneurs.com/jenkins/
******************************************************
And:
Pilar Fleige RN
http://www.spanish4nurses.com
******************************************************
Personally, I'd focus trying to develop the online offerings. There are only so many seminars you can teach in a day, week or year. If the information was online, an unlimited # of students could access it on a daily basis (each paying the appropriate fee of course

)
Like your site by the way
Andrew Lopez, RN
http://www.nursingentrepreneurs.com