To answer the question more comprehensively: the distinction between an inclusive and an exclusive 1st person plural (we including you vs we excluding you) is Clusivity:
First-person clusivity is a common feature among Dravidian, Kartvelian, Caucasic, Australian and Austronesian, and is also found in languages of eastern, southern, and southwestern Asia, Americas, and in some creole languages. Some African languages also make this distinction, such as the Fula language. No European language outside the Caucasus makes this distinction grammatically, but some constructions may be semantically inclusive or exclusive.
The inclusive–exclusive distinction occurs nearly universally among the Austronesian languages and the languages of northern Australia, but rarely in the nearby Papuan languages. (Tok Pisin, an English-Melanesian pidgin, generally has the inclusive–exclusive distinction, but this varies with the speaker’s language background.) It is widespread in India (among the Dravidian and Munda languages, as well as in the Indo-European languages of Marathi, Rajasthani, Punjabi, Sindhi, and Gujarati, which borrowed it from Dravidian), and in the languages of eastern Siberia, such as Tungusic, from which it was borrowed into northern Mandarin Chinese. In indigenous languages of the Americas it is found in about half the languages, with no clear geographic or genealogical pattern. It is also found in a few languages of the Caucasus and Sub-Saharan Africa, such as Fulani and Khoekhoe.
It is, of course, possible in any language to express the idea of clusivity semantically, and many languages provide common forms that clarify the ambiguity of their first person pronoun (English “the rest of us”, Italian noialtri). A language with a true clusivity distinction, however, does not provide a first person plural with indefinite clusivity: where the clusivity of the pronoun is ambiguous; rather, the speaker is forced to specify – by choice of pronoun or inflection – whether he is including the addressee or not. This rules out most European languages, for example. Clusivity is nonetheless a very common language feature overall. Some languages with more than one plural number make the clusivity distinction only in, for example, the dual, but not in the greater plural. Others make it in all numbers. In the table below, the plural forms are the ones preferentially listed.