How do I access Language File to change tesxt

I have the RASA2 Template and I want to change the text in Login module from "Sign Up" to "Register" How do I change?

jeflev Kindly review as your admin details added in edit fields arent working so as to take closer look

You may also try change and add your language constant in /language/en-GB/en-GB.mod_login.ini :

MOD_LOGIN_REGISTER="Your_text_here"