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Text copied from https://www.google.com/get/noto/

NotoMono/README.rst

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+Noto Mono for Powerline
+=======================
+
+:Font creator: Google (company)
+:Source: https://www.google.com/get/noto/
+:License: SIL OPEN FONT LICENSE Version 1.1
+:Patched by: `Daniel Wood <https://github.com/theamazingfedex>`_
+
+When text is rendered by a computer, sometimes characters are displayed as 
+“tofu”. They are little boxes to indicate your device doesn’t have a font to 
+display the text.
+
+Google has been developing a font family called Noto, which aims to support all 
+languages with a harmonious look and feel. Noto is Google’s answer to tofu. The 
+name noto is to convey the idea that Google’s goal is to see “no more tofu”. 
+Noto has multiple styles and weights, and is freely available to all.