Since you mentioned answer headers in general as well, use `#Language` or `##Language` like Riker said, but then after that, it is pretty standard to use a format like this, using a comma, strikes, and `bytes`:

	# Language, <s>127</s> <s>98</s> 95 bytes

Like this:

#Python 2, <s>127</s> <s>98</s> 95 bytes

And if your language is supported for prettify markup, you can use `<!-- language: lang-python -->` or something similar for syntax highlighting.