ECMA International is a well-known international standard organization.
The existing title of:
> The Dart Language is now an ECMA standard
Makes a lot more sense than
> The Dart Language is now an ECMALang standard
Which is an unknown term, to hypothetically mean it's a Standard for a language published by ECMA, which is exactly what the existing (more familiar) title suggested.
I did not propose we rename the submission title, but the language. Also, it was a joke, in reference to that other language that starts with the characters "ECMA" and whose many other confusing multi-meaning names have become notorious.
The original name of the language was LiveScript. ECMAScript is the name of the specification submitted to the ECMA, because Oracle owns the trademark to JavaScript and licenses it to Mozilla for their use; Microsoft decided to call their implementation (created prior to ECMA standardization, I believe) JScript to avoid paying Oracle money.