Meta language and Meta robot missing

[symptome]

I should use something like this:

<meta name="language" content="de" />
<meta name="robots" content="index follow" />

Where do I have to enter it, so vbulletin puts it in the code?
Or do I have to enter it myself? In headinclude template?

I'm just not sure, if it is a good idea because vbulletin seems to ignore it

What do you mean?

[Dismounted]

You can put those tags in the headinclude template.