This article describes an issue of how to customize the Form control’s text, for example, if you want to change the form step text from "Previous Step" to "Previous Page" and "Next step" to "Next Page". 

Edith the following xml file in the modules folder: 

wwwroot\modules\_protected\EPiServer.Forms\EPiServer.Forms.zip\EmbeddedLangFiles\EPiServer.Forms_EN.xml and change the  text from "Previous Step" to "Previous Page" and "Next step" to "Next Page" 

Finally, put the XML file into the folder where Episerver is told to read them. In case of the MVC site, it is \wwwroot\Resources\LanguageFiles