I don't speak English and my former employer stole my idea/skills, what can I do?

I worked on improvement and skills how to improve finishing Orthodontist Appliances, Braces. I finally improved and I found skills fastest way and easy way to finish and have best product and bring minimum 40% more business, As I don't speak English and I am easy to misunderstand. After all my employer intimidated and fabricated last situation and fired me for non sense reason, I told them I only want my job and everything I did is for all and company, to keep people to have job. I was used for nothing, and bean fired for reason I can't accept it, I've bean reader fired for lousy job performance then to be fired for something I didn't do. As I am English limited person and powerless for them is easy to fabricate and make me fill like doormat. Please answer my question what I should do. I do have have lawyer for Discrimination law, but I m not sure about stolen idea/skills. I give to this company what they never had before 2014. My English is not good, please forgive me for this error.