In English, Dogmas is also a correct pluralization of the (English) word Dogma.
While the Latin and Greek decline to Dogmata, and that is considered acceptable as well in English, the requirement of following the Latin/Greek form has not been retained for this word.
I've been looking, and every source I can find always lists both Dogmas and Dogmata (both) as the plural form of Dogma, and official sources for which the term is particularly relevant and which at times may translate the Latin to the English always translate it into English as Dogmas.
So, go ahead and use Dogmas when writing or speaking in English. Just don't get it confused when you decide to write or speak in Latin or Greek.